--- old/src/java.compiler/share/classes/javax/lang/model/element/Element.java	2017-02-01 13:37:55.314533796 -0800
+++ new/src/java.compiler/share/classes/javax/lang/model/element/Element.java	2017-02-01 13:37:55.214583793 -0800
@@ -139,7 +139,7 @@
      *
      * <li> If this is a {@linkplain
      * PackageElement#getEnclosingElement package}, its module is
-     * returned.
+     * returned if such a module exists. Otherwise, {@code null} is returned.
      *
      * <li> If this is a {@linkplain
      * TypeParameterElement#getEnclosingElement type parameter},