--- icewm-1.2.3pre1/src/wmclient.h	2002-10-20 10:04:55.000000000 -0400
+++ src/wmclient.h	2002-10-29 15:50:25.000000000 -0500
@@ -13,9 +13,10 @@
 
 #ifndef __YIMP_XUTIL__
 //!!! remove these if possible
-typedef struct XWMHints;
-typedef struct XSizeHints;
-typedef struct XClassHint;
+//typedef struct XWMHints;
+//typedef struct XSizeHints;
+//typedef struct XClassHint;
+#include <X11/Xutil.h>
 #endif
 
 class ClientData {