diff --git a/Pmodules/modulecmd.bash.in b/Pmodules/modulecmd.bash.in
index 43b0633..3898101 100644
--- a/Pmodules/modulecmd.bash.in
+++ b/Pmodules/modulecmd.bash.in
@@ -1517,7 +1517,7 @@ subcommand_use() {
 		if [[ ! -d ${arg} ]]; then
 			std::die 3 "%s %s: %s -- %s" \
                                  "${CMD}" "${subcommand}" \
-                                 "illegal argument" \
+                                 "illegal argument: is neither a valid keyword, group nor directory" \
                                  "${arg}"
                 fi