diff --git a/demo_source.sh b/demo_source.sh
index a7eea46..773a8e8 100755
--- a/demo_source.sh
+++ b/demo_source.sh
@@ -6,8 +6,8 @@
 
 function upgrade {
   echo "UPGRADE: $*"
-  if sudo -E "$MIAOU_BASH_DIR"/bin/miaou-bash "$MIAOU_BASH_DIR"/none.sh 3>&1; then
-    echo FAILURE "$@"
+  if ! sudo -E "$MIAOU_BASH_DIR"/bin/miaou-bash "$MIAOU_BASH_DIR"/none.sh 3>&1; then
+    echo "FAILURE exit_code=$?"
   fi
 }