--- OLD/xc/lib/Xdmcp/Alloc.c	Thu Jan  1 00:00:00 1970
+++ NEW/xc/lib/Xdmcp/Alloc.c	Thu Jan  1 00:00:00 1970
@@ -25,7 +25,7 @@
 
 /* stubs for use when Xalloc, Xrealloc and Xfree are not defined */
 
-extern char	*malloc (), *realloc ();
+#include <stdlib.h>
 
 long *
 Xalloc (amount)