diff -r f050c714b556 -r b25e387481dc src/share/classes/com/sun/tools/javadoc/ClassDocImpl.java
--- a/src/share/classes/com/sun/tools/javadoc/ClassDocImpl.java	Fri Aug 30 16:27:08 2013 -0700
+++ b/src/share/classes/com/sun/tools/javadoc/ClassDocImpl.java	Fri Aug 30 16:38:54 2013 -0700
@@ -289,7 +289,7 @@
     }
 
     public boolean isFunctionalInterface() {
-        return env.types.isFunctionalInterface(tsym);
+        return env.types.isFunctionalInterface(tsym) && env.source.allowLambda();
     }
 
     /**