diff --git a/packages/camlimages.4.1.0/opam b/packages/camlimages.4.1.0/opam
index dafade29484..433f22e7e88 100644
--- a/packages/camlimages.4.1.0/opam
+++ b/packages/camlimages.4.1.0/opam
@@ -17,3 +17,5 @@ authors: [
   "François Pessaux"
   "Pierre Weis"
 ]
+
+ocaml-version: [ >= "4.00.0" ]