diff --git a/tips/06-style-props-value-px.md b/tips/06-style-props-value-px.md
index 5f099113..3f308cbc 100644
--- a/tips/06-style-props-value-px.md
+++ b/tips/06-style-props-value-px.md
@@ -19,6 +19,7 @@ See [Inline Styles](/react/tips/inline-styles.html) for more info.
 Sometimes you _do_ want to keep the CSS properties unitless. Here's a list of properties that won't get the automatic "px" suffix:
 
 - `boxFlex`
+- `boxFlexGroup`
 - `columnCount`
 - `fillOpacity`
 - `flex`