diff --git a/plugins/system/cpubyuser b/plugins/system/cpubyuser
index f2c548f1..04dc2c2f 100755
--- a/plugins/system/cpubyuser
+++ b/plugins/system/cpubyuser
@@ -43,7 +43,7 @@ if [ "$1" = "autoconf" ]; then
 	if [ -n "$USERS" ]; then
 		echo "yes"
 	else
-		echo "\$USERS not defined."
+		echo "no (USERS setting is missing)"
 	fi
 	exit
 fi