--- src/include/cpstd.h.orig	2005-12-17 13:10:09.000000000 +0000
+++ src/include/cpstd.h
@@ -50,7 +50,9 @@ extern char *tildexpand();
 extern char *printnum();
 extern int cp_numdgt;
 extern void fatal();
+#ifndef _STDLIB_H_
 extern void setenv();
+#endif
 extern void cp_printword();
 
 /* Externs from wlist.c */