diff --git a/xwin.c b/xwin.c
index 107df75..467114b 100644
--- a/xwin.c
+++ b/xwin.c
@@ -946,7 +946,8 @@ BOOL
 ui_create_window(void)
 {
 	uint8 null_pointer_mask[1] = { 0x80 };
-	uint8 null_pointer_data[9] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	uint8 null_pointer_data[24] = { 0x00 };
+
 	XSetWindowAttributes attribs;
 	XClassHint *classhints;
 	XSizeHints *sizehints;