diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 78e4474c428a1862664d18d19d6e02423e8e6d35..ce1b0bc7016e1c922336f94f03288c639e3d3c9e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -383,7 +383,7 @@ cppcheck:
   #only:
   #  - develop@irmb/VirtualFluids_dev
   rules:
-    - if: '$CI_PROJECT_NAMESPACE == "irmb" && $CI_COMMIT_BRANCH == develop'
+    - if: '$CI_PROJECT_NAMESPACE == "irmb" && $CI_COMMIT_BRANCH == "develop"'
     - when: manual
 
   needs: []