diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 92f578bca9c70f818e3cd019d267e8592b588370..be6af958571a886d17981da351ce1335a0cf0b7c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -33,7 +33,7 @@ whitespace:
     - apt-get update &&
       apt-get install -y git
   script:
-    - git diff-tree --check origin/master HEAD
+    - git diff-tree --check origin/main HEAD
 
 # Make sure commits are GPG signed
 ci-fairy: