diff --git a/packages/camlbz2/camlbz2.0.6.0/opam b/packages/camlbz2/camlbz2.0.6.0/opam
index 0f6354abe99..87cd240da93 100644
--- a/packages/camlbz2/camlbz2.0.6.0/opam
+++ b/packages/camlbz2/camlbz2.0.6.0/opam
@@ -13,7 +13,7 @@ build: [
   [make]
 ]
 depends: [
-  "ocaml"
+  "ocaml" {< "5.0"}
   "ocamlfind"
   "conf-libbz2"
 ]
diff --git a/packages/camlbz2/camlbz2.0.7.0/opam b/packages/camlbz2/camlbz2.0.7.0/opam
index 664ca5c4dee..dda00a4d6bb 100644
--- a/packages/camlbz2/camlbz2.0.7.0/opam
+++ b/packages/camlbz2/camlbz2.0.7.0/opam
@@ -15,7 +15,7 @@ build: [
   [make]
 ]
 depends: [
-  "ocaml"
+  "ocaml" {< "5.0"}
   "ocamlfind"
   "conf-autoconf"
   "conf-aclocal"