--- a/langtools/test/tools/sjavac/JavacOptionPrep.java	Wed Jul 05 22:10:57 2017 +0200
+++ b/langtools/test/tools/sjavac/JavacOptionPrep.java	Tue Sep 06 17:04:43 2016 -0700
@@ -96,7 +96,7 @@
 
             // Ignore this option for now. When the file=... requirement goes
             // away, this will be easier to handle.
-            if (option.startsWith("-Xdebug:completionDeps"))
+            if (option.startsWith("--debug:completionDeps"))
                 continue;
 
             switch (option) {