diff --git a/prepare.sh b/prepare.sh
index 1556968114ed257eb1c5348eb1cfe3c3f1a170a3..9347c143763ca8451e069ebcc3f19385688e1c46 100755
--- a/prepare.sh
+++ b/prepare.sh
@@ -8,4 +8,10 @@ patch_target() {
   fi
 }
 
-patch_target
+cd ..
+if git status  | head -n1 | grep "v2016.2.x"; then
+  patch_target
+else
+  echo "no gluon repo founden or wrong branch"
+  exit 1
+fi