diff --git a/fhem/FHEM/61_EMWZ.pm b/fhem/FHEM/61_EMWZ.pm
index 2396daec0..d53addceb 100755
--- a/fhem/FHEM/61_EMWZ.pm
+++ b/fhem/FHEM/61_EMWZ.pm
@@ -146,7 +146,7 @@ EMWZ_Set($@)
     $v *= 10; # Make display and input the same
     $msg = sprintf("79%02x3102%02x%02x", $d-1, $v%256, int($v/256));
   } else {
-    return $u;
+    return "Unknown argument $a[1], choose one of price alarm rperkw";
   }
 
 
diff --git a/fhem/FHEM/63_EMGZ.pm b/fhem/FHEM/63_EMGZ.pm
index 6ec588fc5..41ee5aac2 100644
--- a/fhem/FHEM/63_EMGZ.pm
+++ b/fhem/FHEM/63_EMGZ.pm
@@ -138,7 +138,7 @@ EMGZ_Set($@)
     $v *= 10000; # Make display and input the same
     $msg = sprintf("79%02x2f02%02x%02x", $d-1, $v%256, int($v/256));
   } else {
-    return $u;
+    return "Unknown argument $a[1], choose one of price";
   }