diff --git a/dev-ml/async_unix/async_unix-0.14.0.ebuild b/dev-ml/async_unix/async_unix-0.14.0.ebuild
index cce539b925765..21ea506bd4f52 100644
--- a/dev-ml/async_unix/async_unix-0.14.0.ebuild
+++ b/dev-ml/async_unix/async_unix-0.14.0.ebuild
@@ -16,7 +16,7 @@ IUSE="+ocamlopt"
 
 RDEPEND="
 	dev-ml/async_kernel:=
-	dev-ml/core:=
+	=dev-ml/core-0.14*:=
 	dev-ml/core_kernel:=
 	dev-ml/ppx_jane:=
 "