langtools/src/jdk.jdeps/share/classes/com/sun/tools/jdeps/ModuleAnalyzer.java

@@ -75,11 +75,11 @@
 
         if (!config.initialArchives().isEmpty()) {
             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;
         this.log = log;