diff -ruN tcp_wrappers_7.6.orig/percent_m.c tcp_wrappers_7.6/percent_m.c
--- tcp_wrappers_7.6.orig/percent_m.c	1994-12-28 17:42:37.000000000 +0100
+++ tcp_wrappers_7.6/percent_m.c	2003-08-21 02:45:31.000000000 +0200
@@ -29,11 +29,15 @@
 
     while (*bp = *cp)
 	if (*cp == '%' && cp[1] == 'm') {
+#ifdef HAVE_STRERROR
+	    strcpy(bp, strerror(errno));
+#else
 	    if (errno < sys_nerr && errno > 0) {
 		strcpy(bp, sys_errlist[errno]);
 	    } else {
 		sprintf(bp, "Unknown error %d", errno);
 	    }
+#endif
 	    bp += strlen(bp);
 	    cp += 2;
 	} else {
