diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1de5533e8c2c9a0898bf0b4de78e19db0c455913..aa8da433ee5cace25ea84d021883fa76e13db033 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -51,6 +51,7 @@ build-coq.8.8.1:
 build-coq.8.8.0:
   <<: *template
   variables:
+    OCAML: "ocaml-base-compiler.4.02.3"
     OPAM_PINS: "coq version 8.8.0"
     OPAM_PKG: "coq-stdpp"
     DOC_DIR: "coqdoc@center.mpi-sws.org:stdpp"