diff --git a/src/platform/guimac.mm b/src/platform/guimac.mm
index 59c10be..19ef3ca 100644
--- a/src/platform/guimac.mm
+++ b/src/platform/guimac.mm
@@ -894,7 +894,7 @@ public:
         *height = nsSize.height;
     }
 
-    void SetMinContentSize(double width, double height) {
+    void SetMinContentSize(double width, double height) override {
         NSSize nsMinSize;
         nsMinSize.width  = width;
         nsMinSize.height = height;