diff --git a/src/meta/boxes.h b/src/meta/boxes.h
index 8446f5c25..39afe4277 100644
--- a/src/meta/boxes.h
+++ b/src/meta/boxes.h
@@ -62,3 +62,9 @@ struct _MetaEdge
   MetaSide side_type;
   MetaEdgeType  edge_type;
 };
+
+/*
+ * For GNOME Shell extensions compatibility purposes only.
+ * TODO: drop for GNOME 46
+ */
+typedef MtkRectangle MetaRectangle;