diff --git a/css-properties-values-api/Overview.bs b/css-properties-values-api/Overview.bs index 36871710..1caace06 100644 --- a/css-properties-values-api/Overview.bs +++ b/css-properties-values-api/Overview.bs @@ -602,7 +602,7 @@ dictionary PropertyDefinition { }; partial namespace CSS { - void registerProperty(PropertyDefinition definition); + undefined registerProperty(PropertyDefinition definition); };