--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties	Fri Feb 27 18:20:33 2015 +0000
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties	Mon Mar 02 10:41:08 2015 +0530
@@ -2421,6 +2421,11 @@
     static interface method invocations are not supported in -source {0}\n\
     (use -source 8 or higher to enable static interface method invocations)
 
+# 0: string
+compiler.err.private.intf.methods.not.supported.in.source=\
+    private interface methods are not supported in -source {0}\n\
+    (use -source 9 or higher to enable private interface methods)
+
 ########################################
 # Diagnostics for verbose resolution
 # used by Resolve (debug only)