diff --git a/bs-css/src/Css_Legacy_Core.res b/bs-css/src/Css_Legacy_Core.res
index a8102f4..e215872 100644
--- a/bs-css/src/Css_Legacy_Core.res
+++ b/bs-css/src/Css_Legacy_Core.res
@@ -1820,7 +1820,7 @@ let fontFace = (
       }
     )
     ->Belt.List.toArray
-    ->Js.Array2.joinWith(" ")
+    ->Js.Array2.joinWith(", ")
 
   let fontStyle = Belt.Option.mapWithDefault(fontStyle, "", s => "font-style: " ++ (s ++ ";"))
   let fontWeight = Belt.Option.mapWithDefault(fontWeight, "", w =>