diff --git a/.gitlab-ci-checkcommit.sh b/.gitlab-ci-checkcommit.sh
new file mode 100755
index 0000000..9023410
--- /dev/null
+++ b/.gitlab-ci-checkcommit.sh
@@ -0,0 +1,9 @@
+#! /usr/bin/env bash
+
+git fetch https://gitlab.freedesktop.org/drm-hwcomposer/drm-hwcomposer.git
+
+git diff -U0 --no-color FETCH_HEAD...HEAD -- | clang-format-diff-5.0 -p 1 -style=file > format-fixup.patch
+if [ -s format-fixup.patch ]; then
+	cat format-fixup.patch
+	exit 1
+fi