--- lib/cdialect.h.orig	Sun Oct 10 17:41:50 1999
+++ lib/cdialect.h	Sun Oct 10 17:42:14 1999
@@ -135,7 +135,7 @@
 
 
 #ifndef HAS_STRDUP
-extern char * strdup _((char *s));
+extern char * strdup _((const char *s));
 #endif /* not HAS_STRDUP */
 #endif /* not C_DIALECT */