diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0e906bcd8378a65463c807d0c0f2a4fa5836c6cd..b86edc086cc69f4e49723caa251b5b7ae1977def 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -162,7 +162,7 @@ trigger lecture:
     DUMUX_MERGE_REQUEST_TARGET_BRANCH: $CI_MERGE_REQUEST_TARGET_BRANCH_NAME
     DUMUX_COMMIT_SHA: $CI_COMMIT_SHA
     DUMUX_REFERENCE_SHA: $CI_REFERENCE_SHA
-    DUMUX_DOCKER_CI_BRANCH: $DUMUX_DOCKER_CI_BRANCH
+    DUMUX_DOCKER_BRANCH: $DUMUX_DOCKER_CI_BRANCH
     UBUNTU_VERSION: $UBUNTU_VERSION
 
 ################################################