diff --git a/makefiles/docker.inc.mk b/makefiles/docker.inc.mk
index 488c901b9381..372955c2eb49 100644
--- a/makefiles/docker.inc.mk
+++ b/makefiles/docker.inc.mk
@@ -53,6 +53,7 @@ export DOCKER_ENV_VARS = \
   PREFIX \
   QUIET \
   WERROR \
+  RIOT_CI_BUILD \
   RIOT_VERSION \
   SCANBUILD_ARGS \
   SCANBUILD_OUTPUTDIR \