diff -uNr arc-5.21m.orig/arcrun.c arc-5.21m/arcrun.c
--- arc-5.21m.orig/arcrun.c	2005-09-21 18:39:57.000000000 +0200
+++ arc-5.21m/arcrun.c	2005-10-08 12:27:46.000000000 +0200
@@ -25,7 +25,6 @@
 VOID	rempath(), openarc(), closearc(), arcdie();
 int	readhdr(), match(), unpack();
 static	VOID	runfile();
-char	*strcat();
 
 VOID
 runarc(num, arg)		/* run file from archive */