diff -r ca682d9d8db5 -r f41793b5b83f src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/ModuleFrameWriter.java
--- a/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/ModuleFrameWriter.java	Thu Feb 21 16:56:06 2019 -0800
+++ b/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/ModuleFrameWriter.java	Thu Feb 21 17:50:27 2019 -0800
@@ -32,6 +32,7 @@
 import javax.lang.model.element.TypeElement;
 import javax.lang.model.util.ElementFilter;
 
+import jdk.javadoc.internal.doclets.formats.html.markup.HtmlConstants;
 import jdk.javadoc.internal.doclets.formats.html.markup.HtmlStyle;
 import jdk.javadoc.internal.doclets.formats.html.markup.HtmlTag;
 import jdk.javadoc.internal.doclets.formats.html.markup.HtmlTree;
@@ -100,7 +101,7 @@
         DocPath moduleSummary = configuration.useModuleDirectories
                 ? DocPaths.DOT_DOT.resolve(configuration.docPaths.moduleSummary(moduleElement))
                 : configuration.docPaths.moduleSummary(moduleElement);
-        Content heading = HtmlTree.HEADING(Headings.PAGE_TITLE_HEADING, HtmlStyle.bar,
+        Content heading = HtmlTree.HEADING(HtmlConstants.TITLE_HEADING, HtmlStyle.bar,
                 mdlgen.links.createLink(moduleSummary, mdlLabel, "", "classFrame"));
         htmlTree.addContent(heading);
         HtmlTree div = new HtmlTree(HtmlTag.DIV);
@@ -170,7 +171,7 @@
                     continue;
                 }
                 if (!printedHeader) {
-                    Content heading = HtmlTree.HEADING(Headings.CONTENT_HEADING,
+                    Content heading = HtmlTree.HEADING(HtmlConstants.CONTENT_HEADING,
                             true, labelContent);
                     htmlTree.addContent(heading);
                     printedHeader = true;