diff --git a/bin/delete_user.sh b/bin/delete_user.sh
index 52d5bbb..8a06ee5 100755
--- a/bin/delete_user.sh
+++ b/bin/delete_user.sh
@@ -164,9 +164,13 @@ for username in "$@"; do
 
 	echo "[1] Remove user + home dir";
 	if [ ${TEST} -eq 0 ]; then
-		userdel -r "${username}"
+		# remove all secondary group entries first before we delete the user
+		# there might be cases where they are left
+		usermod -G "" "${username}";
+		userdel -r "${username}";
 	else
-		echo "$> userdel -r ${username}";
+		echo "$> usermod -G \"\" \"${username}\"";
+		echo "$> userdel -r \"${username}\"";
 	fi;
 
 	# remove ssh files in pub