--- a/langtools/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/ModuleIndexWriter.java	Fri Mar 10 09:52:49 2017 -0800
+++ b/langtools/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/ModuleIndexWriter.java	Mon Mar 13 09:55:31 2017 -0700
@@ -144,7 +144,6 @@
         Content div = HtmlTree.DIV(HtmlStyle.contentContainer, table);
         if (configuration.allowTag(HtmlTag.MAIN)) {
             htmlTree.addContent(div);
-            body.addContent(htmlTree);
         } else {
             body.addContent(div);
         }
@@ -189,7 +188,6 @@
             addOverviewComment(div);
             if (configuration.allowTag(HtmlTag.MAIN)) {
                 htmlTree.addContent(div);
-                body.addContent(htmlTree);
             } else {
                 body.addContent(div);
             }
@@ -210,12 +208,16 @@
     }
 
     /**
-     * Not required for this page.
+     * For HTML 5, add the htmlTree to the body. For HTML 4, do nothing.
      *
      * @param body the documentation tree to which the overview will be added
      */
     @Override
-    protected void addOverview(Content body) {}
+    protected void addOverview(Content body) {
+        if (configuration.allowTag(HtmlTag.MAIN)) {
+            body.addContent(htmlTree);
+        }
+    }
 
     /**
      * Adds the top text (from the -top option), the upper

--- a/langtools/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/PackageIndexWriter.java	Fri Mar 10 09:52:49 2017 -0800
+++ b/langtools/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/PackageIndexWriter.java	Mon Mar 13 09:55:31 2017 -0700
@@ -134,7 +134,6 @@
         Content div = HtmlTree.DIV(HtmlStyle.contentContainer, table);
         if (configuration.allowTag(HtmlTag.MAIN)) {
             htmlTree.addContent(div);
-            body.addContent(htmlTree);
         } else {
             body.addContent(div);
         }
@@ -182,7 +181,6 @@
             addOverviewComment(div);
             if (configuration.allowTag(HtmlTag.MAIN)) {
                 htmlTree.addContent(div);
-                body.addContent(htmlTree);
             } else {
                 body.addContent(div);
             }
@@ -203,12 +201,16 @@
     }
 
     /**
-     * Not required for this page.
+     * For HTML 5, add the htmlTree to the body. For HTML 4, do nothing.
      *
      * @param body the documentation tree to which the overview will be added
      */
     @Override
-    protected void addOverview(Content body) {}
+    protected void addOverview(Content body) {
+        if (configuration.allowTag(HtmlTag.MAIN)) {
+            body.addContent(htmlTree);
+        }
+    }
 
     /**
      * Adds the top text (from the -top option), the upper

--- a/langtools/test/jdk/javadoc/doclet/testModules/TestModules.java	Fri Mar 10 09:52:49 2017 -0800
+++ b/langtools/test/jdk/javadoc/doclet/testModules/TestModules.java	Mon Mar 13 09:55:31 2017 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -23,7 +23,7 @@
 
 /*
  * @test
- * @bug 8154119 8154262 8156077 8157987 8154261 8154817 8135291 8155995 8162363 8168766 8168688 8162674 8160196
+ * @bug 8154119 8154262 8156077 8157987 8154261 8154817 8135291 8155995 8162363 8168766 8168688 8162674 8160196 8175799
  * @summary Test modules support in javadoc.
  * @author bpatel
  * @library ../lib
@@ -44,6 +44,7 @@
     @Test
     void testHtml4() {
         javadoc("-d", "out", "-use",
+                "-overview", testSrc("overview.html"),
                 "--module-source-path", testSrc,
                 "--module", "moduleA,moduleB",
                 "testpkgmdlA", "testpkgmdlB");
@@ -65,6 +66,7 @@
     @Test
     void testHtml5() {
         javadoc("-d", "out-html5", "-html5", "-use",
+                "-overview", testSrc("overview.html"),
                 "--module-source-path", testSrc,
                 "--module", "moduleA,moduleB",
                 "testpkgmdlA", "testpkgmdlB");
@@ -86,6 +88,7 @@
     @Test
     void testHtml4NoComment() {
         javadoc("-d", "out-nocomment", "-nocomment", "-use",
+                "-overview", testSrc("overview.html"),
                 "--module-source-path", testSrc,
                 "--module", "moduleA,moduleB",
                 "testpkgmdlA", "testpkgmdlB");
@@ -103,6 +106,7 @@
     @Test
     void testHtml5NoComment() {
         javadoc("-d", "out-html5-nocomment", "-nocomment", "-html5", "-use",
+                "-overview", testSrc("overview.html"),
                 "--module-source-path", testSrc,
                 "--module", "moduleA,moduleB",
                 "testpkgmdlA", "testpkgmdlB");
@@ -120,6 +124,7 @@
     @Test
     void testHtml4UnnamedModule() {
         javadoc("-d", "out-nomodule", "-use",
+                "-overview", testSrc("overview.html"),
                 "-sourcepath", testSrc,
                 "testpkgnomodule", "testpkgnomodule1");
         checkExit(Exit.OK);
@@ -136,6 +141,7 @@
     @Test
     void testHtml5UnnamedModule() {
         javadoc("-d", "out-html5-nomodule", "-html5", "-use",
+                "-overview", testSrc("overview.html"),
                 "-sourcepath", testSrc,
                 "testpkgnomodule", "testpkgnomodule1");
         checkExit(Exit.OK);
@@ -265,6 +271,23 @@
                 + "</a>\n"
                 + "<div class=\"block\">This is a test description for the moduleB module. Search "
                 + "word <a id=\"search_word\">search_word</a> with no description.</div>");
+        checkOutput("overview-summary.html", found,
+                "</script>\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<div class=\"block\">The overview summary page header.</div>\n"
+                + "</div>\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<table class=\"overviewSummary\" summary=\"Module Summary table, listing modules, and an explanation\">\n"
+                + "<caption><span>Modules</span><span class=\"tabEnd\">&nbsp;</span></caption>");
+        checkOutput("overview-summary.html", false,
+                "</table>\n"
+                + "</div>\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<div class=\"block\">The overview summary page header.</div>\n"
+                + "</div>\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<table class=\"overviewSummary\" summary=\"Module Summary table, listing modules, and an explanation\">\n"
+                + "<caption><span>Modules</span><span class=\"tabEnd\">&nbsp;</span></caption>");
     }
 
     void checkNoDescription(boolean found) {
@@ -305,6 +328,27 @@
                 + "</a>\n"
                 + "<div class=\"block\">This is a test description for the moduleB module. Search "
                 + "word <a id=\"search_word\">search_word</a> with no description.</div>");
+        checkOutput("overview-summary.html", found,
+                "</nav>\n"
+                + "</header>\n"
+                + "<main role=\"main\">\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<div class=\"block\">The overview summary page header.</div>\n"
+                + "</div>\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<table class=\"overviewSummary\">\n"
+                + "<caption><span>Modules</span><span class=\"tabEnd\">&nbsp;</span></caption>");
+        checkOutput("overview-summary.html", false,
+                "</table>\n"
+                + "</div>\n"
+                + "</main>\n"
+                + "<main role=\"main\">\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<div class=\"block\">The overview summary page header.</div>\n"
+                + "</div>\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<table class=\"overviewSummary\">\n"
+                + "<caption><span>Modules</span><span class=\"tabEnd\">&nbsp;</span></caption>");
     }
 
     void checkHtml5NoDescription(boolean found) {
@@ -403,14 +447,29 @@
                 + "<tr>\n"
                 + "<th class=\"colFirst\" scope=\"col\">Module</th>\n"
                 + "<th class=\"colLast\" scope=\"col\">Description</th>\n"
-                + "</tr>");
+                + "</tr>",
+                "</table>\n"
+                + "</div>\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<div class=\"block\">The overview summary page header.</div>\n"
+                + "</div>\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<table class=\"overviewSummary\" summary=\"Packages table, listing packages, and an explanation\">\n"
+                + "<caption><span>Packages</span><span class=\"tabEnd\">&nbsp;</span></caption>");
         checkOutput("overview-summary.html", true,
                 "<table class=\"overviewSummary\" summary=\"Packages table, listing packages, and an explanation\">\n"
                 + "<caption><span>Packages</span><span class=\"tabEnd\">&nbsp;</span></caption>\n"
                 + "<tr>\n"
                 + "<th class=\"colFirst\" scope=\"col\">Package</th>\n"
                 + "<th class=\"colLast\" scope=\"col\">Description</th>\n"
-                + "</tr>");
+                + "</tr>",
+                "</script>\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<div class=\"block\">The overview summary page header.</div>\n"
+                + "</div>\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<table class=\"overviewSummary\" summary=\"Packages table, listing packages, and an explanation\">\n"
+                + "<caption><span>Packages</span><span class=\"tabEnd\">&nbsp;</span></caption>");
     }
 
     void checkHtml5OverviewSummaryModules() {
@@ -437,14 +496,34 @@
                 + "<tr>\n"
                 + "<th class=\"colFirst\" scope=\"col\">Module</th>\n"
                 + "<th class=\"colLast\" scope=\"col\">Description</th>\n"
-                + "</tr>");
+                + "</tr>",
+                "</table>\n"
+                + "</div>\n"
+                + "</main>\n"
+                + "<main role=\"main\">\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<div class=\"block\">The overview summary page header.</div>\n"
+                + "</div>\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<table class=\"overviewSummary\">\n"
+                + "<caption><span>Packages</span><span class=\"tabEnd\">&nbsp;</span></caption>");
         checkOutput("overview-summary.html", true,
                 "<table class=\"overviewSummary\">\n"
                 + "<caption><span>Packages</span><span class=\"tabEnd\">&nbsp;</span></caption>\n"
                 + "<tr>\n"
                 + "<th class=\"colFirst\" scope=\"col\">Package</th>\n"
                 + "<th class=\"colLast\" scope=\"col\">Description</th>\n"
-                + "</tr>");
+                + "</tr>",
+                "</script>\n"
+                + "</nav>\n"
+                + "</header>\n"
+                + "<main role=\"main\">\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<div class=\"block\">The overview summary page header.</div>\n"
+                + "</div>\n"
+                + "<div class=\"contentContainer\">\n"
+                + "<table class=\"overviewSummary\">\n"
+                + "<caption><span>Packages</span><span class=\"tabEnd\">&nbsp;</span></caption>");
     }
 
     void checkModuleSummary() {

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/jdk/javadoc/doclet/testModules/overview.html	Mon Mar 13 09:55:31 2017 -0700
@@ -0,0 +1,6 @@
+<!DOCTYPE HTML>
+<html>
+<body>
+    The overview summary page header.
+</body>
+</html>