--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/sjavac/options/Options.java	Wed Jul 05 22:10:57 2017 +0200
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/sjavac/options/Options.java	Tue Sep 06 17:04:43 2016 -0700
@@ -313,7 +313,7 @@
         }
 
         // Enable dependency generation
-        args.add("-Xdebug:completionDeps=source,class");
+        args.add("--debug:completionDeps=source,class");
 
         // This can't be anything but 'none'. Enforced by sjavac main method.
         args.add("-implicit:" + implicitPolicy);