diff --git a/src/mdx/code.js b/src/mdx/code.js
index 1cbf73d9f3f..65325860fa1 100644
--- a/src/mdx/code.js
+++ b/src/mdx/code.js
@@ -47,6 +47,7 @@ const colorMap = {
   'token comment': '#747458',
   'token function': '#cf3846',
   'token parameter variable': '#277d7b',
+  'token assign-left variable': '#277d7b',
 }
 
 const MonoText = props => <Text sx={{fontFamily: 'mono', fontSize: 1}} {...props} />