diff --git a/css-mixins-1/Overview.bs b/css-mixins-1/Overview.bs
index b9619bad714..93a3b671e03 100644
--- a/css-mixins-1/Overview.bs
+++ b/css-mixins-1/Overview.bs
@@ -1541,7 +1541,8 @@ interface CSSFunctionRule : CSSGroupingRule {
 <dl dfn-for=CSSFunctionRule dfn-type=attribute>
 	<dt><dfn>name</dfn>
 	<dd>
-		The name of the [=custom function=].
+		The result of [=serialize an identifier=]
+		on the [=custom function=]'s name.
 
 	<dt><dfn>returnType</dfn>
 	<dd>
@@ -1563,7 +1564,8 @@ dictionary FunctionParameter {
 <dl dfn-for=FunctionParameter>
 	<dt>name
 	<dd>
-		The name of the [=function parameter=].
+		The result of [=serialize an identifier=]
+		on the [=function parameter=]'s name.
 
 	<dt>type
 	<dd>