--- a/src/jdk.compiler/share/classes/com/sun/source/util/DocTreeFactory.java	Sun Nov 11 21:24:46 2018 +0100
+++ b/src/jdk.compiler/share/classes/com/sun/source/util/DocTreeFactory.java	Mon Nov 12 13:31:41 2018 +0530
@@ -60,6 +60,7 @@
 import com.sun.source.doctree.SinceTree;
 import com.sun.source.doctree.StartElementTree;
 import com.sun.source.doctree.SummaryTree;
+import com.sun.source.doctree.SystemPropertyTree;
 import com.sun.source.doctree.TextTree;
 import com.sun.source.doctree.ThrowsTree;
 import com.sun.source.doctree.UnknownBlockTagTree;
@@ -325,6 +326,15 @@
     }
 
     /**
+     * Create a new {@code SystemPropertyTree} object, to represent a {@code {@systemProperty } } tag.
+     *
+     * @param propertyName the system property name
+     * @return a {@code SystemPropertyTree} object
+     * @since 12
+     */
+    SystemPropertyTree newSystemPropertyTree(Name propertyName);
+
+    /**
      * Create a new {@code TextTree} object, to represent some plain text.
      * @param text the text
      * @return a {@code TextTree} object