diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e86a0534b2374d2881c172e60a22dc9e286db43e..69b6219f346c8ac253681ff6015a56de91dbc87c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -43,6 +43,10 @@ variables:
   ## Internal tag used for the CI
   INTERNAL_TAG: "pipeline-${CI_PIPELINE_ID}"
 
+  ## Default to empty GitHub trigger callbacks
+  GITHUB_SHA: ""
+  GITHUB_REPOSITORY: ""
+
 stages:
   - status-pending
   - config