diff --git a/.travis.yml b/.travis.yml
index 08123822b7c..78a76e163bc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,8 @@ dist: trusty
 sudo: required
 matrix:
   include:
+  - os: linux
+    env: OCAML_VERSION=4.04 OPAM_VERSION=1.2.2
   - os: linux
     env: OCAML_VERSION=4.03 OPAM_VERSION=1.2.2
   - os: linux