--- a/langtools/src/jdk.jdeps/share/classes/com/sun/tools/jdeps/ModuleAnalyzer.java	Wed Aug 10 13:52:02 2016 -0700
+++ b/langtools/src/jdk.jdeps/share/classes/com/sun/tools/jdeps/ModuleAnalyzer.java	Wed Aug 10 15:47:46 2016 -0700
@@ -77,7 +77,7 @@
             String list = config.initialArchives().stream()
                 .map(Archive::getPathName).collect(joining(" "));
             throw new JdepsTask.UncheckedBadArgs(new BadArgs("err.invalid.module.option",
-                list, "-check"));
+                list, "--check"));
         }
 
         this.configuration = config;