diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index aa8da433ee5cace25ea84d021883fa76e13db033..cecbd430d599acd781397ae637b16eb138057f45 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -63,6 +63,7 @@ build-coq.8.8.0:
 build-coq.8.7.2:
   <<: *template
   variables:
+    OCAML: "ocaml-base-compiler.4.02.3"
     OPAM_PINS: "coq version 8.7.2"
     TIMING_PROJECT: "stdpp"
     TIMING_CONF: "coq-8.7.2"