diff --git a/profiles/package.mask b/profiles/package.mask
index 308505327acd9..2ce2b46ee5b45 100644
--- a/profiles/package.mask
+++ b/profiles/package.mask
@@ -523,6 +523,7 @@ app-emulation/wine-any
 >=dev-lang/ocaml-4.05.0_beta2
 >=dev-ml/camlp4-4.05
 >=dev-ml/ppx_tools-5.0.4.05.0
+>=dev-ml/gen_js_api-1.0.4
 
 # Eray Aslan <eras@gentoo.org> (01 Mar 2017)
 # Mask experimental software