diff --git a/css-typed-om/Overview.bs b/css-typed-om/Overview.bs
index 574b20f9..bf120607 100644
--- a/css-typed-om/Overview.bs
+++ b/css-typed-om/Overview.bs
@@ -1712,7 +1712,7 @@ partial namespace CSS {
     CSSUnitValue vmax(double value);
     CSSUnitValue cm(double value);
     CSSUnitValue mm(double value);
-    CSSUnitValue q(double value);
+    CSSUnitValue Q(double value);
     CSSUnitValue in(double value);
     CSSUnitValue pt(double value);
     CSSUnitValue pc(double value);