diff --git a/wrapper/core/src/main/resources/org/apache/karaf/wrapper/internal/unix/karaf-service b/wrapper/core/src/main/resources/org/apache/karaf/wrapper/internal/unix/karaf-service
index e7cfb25..5d600bf 100644
--- a/wrapper/core/src/main/resources/org/apache/karaf/wrapper/internal/unix/karaf-service
+++ b/wrapper/core/src/main/resources/org/apache/karaf/wrapper/internal/unix/karaf-service
@@ -315,7 +315,7 @@ checkUser() {
                 RUN_AS_GROUP=`groups $RUN_AS_USER | awk '{print $3}' | tail -1`
                 if [ "X$RUN_AS_GROUP" = "X" ]
                 then
-                    RUN_AS_GROUP=RUN_AS_USER
+                    RUN_AS_GROUP=$RUN_AS_USER
                 fi
                 touch $LOCKFILE
                 chown $RUN_AS_USER:$RUN_AS_GROUP $LOCKFILE