diff --git a/tsx11/X11_calls b/tsx11/X11_calls
index 88b9c82..85db993 100644
--- a/tsx11/X11_calls
+++ b/tsx11/X11_calls
@@ -143,6 +143,8 @@
 XSetWMProperties
 XSetWMProtocols
 XSetWMSizeHints
+XShapeCombineMask
+XShapeCombineRectangles
 XShmAttach
 XShmCreateImage
 XShmCreatePixmap