diff --git a/css-values-5/Overview.bs b/css-values-5/Overview.bs
index 3f1ab5659ef..2581860dc59 100644
--- a/css-values-5/Overview.bs
+++ b/css-values-5/Overview.bs
@@ -1185,16 +1185,17 @@ Defining the Interpolation Map</h4>
 	The [=interpolation map=] values are defined as follows:
 
 	<dl dfn-for="calc-interpolate(), transform-interpolate(), color-interpolate(), interpolate()">
-		<dt><dfn type lt="<input-position>|<output-value>"><<input-position>>{1,2} : <<output-value>></dfn>
+		<dt><dfn value><<input-position>>{1,2} : <<output-value>></dfn>
 		<dd>
 			Represents an [=interpolation stop=]
 			associating the specified [=input position=](s) with the specified [=output values=].
 			As with the [=gradient functions=],
 			if two <<input-position>>s are specified,
-			it is treated the same as two stops with the same <<output-value>>.
+			it is treated the same as two stops with the same
+			<dfn><<output-value>></dfn>.
 
 			<pre class=prod>
-				<<input-position>> = <<percentage>> | <<number>> | <<dimension>>
+				<dfn><<input-position>></dfn> = <<percentage>> | <<number>> | <<dimension>>
 			</pre>
 
 			Note: <<output-value>> is not given a grammar here,