diff -urN which-2.19/tilde/xmalloc.h which-2.19-patched/tilde/xmalloc.h
--- which-2.19/tilde/xmalloc.h	2008-01-16 10:07:57.000000000 -0600
+++ which-2.19-patched/tilde/xmalloc.h	2008-03-13 11:47:16.000000000 -0500
@@ -23,12 +23,6 @@
 #if !defined (_XMALLOC_H_)
 #define _XMALLOC_H_
 
-#if defined (READLINE_LIBRARY)
-#  include "rlstdc.h"
-#else
-#  include <readline/rlstdc.h>
-#endif
-
 #ifndef PTR_T
 
 #ifdef __STDC__