diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a9814b143afa99fca1ff31540f527196535658d6..b2303316000e8f2366a28bc8cc9976ef57b61755 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -59,6 +59,7 @@ ghc-linters:
     - ./boot
     - ./configure $CONFIGURE_ARGS
     - hadrian/build.cabal.sh -j`mk/detect-cpu-count.sh`
+    - hadrian/build.cabal.sh -j`mk/detect-cpu-count.sh` docs-haddock
   cache:
     key: hadrian
     paths: