X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/4e5db0ad4a5720b74670e3519dd1f2fea41980a1..32f761755e2cfee243a1513c9ea9871586463fa6:/util.c

diff --git a/util.c b/util.c
index 21ace4df..63af7dab 100644
--- a/util.c
+++ b/util.c
@@ -532,7 +532,8 @@ void glob_expand(char *base1, char **argv, int *argc, int maxargs)
 void strlower(char *s)
 {
 	while (*s) {
-		if (isupper(*s)) *s = tolower(*s);
+		if (isupper(* (unsigned char *) s))
+			*s = tolower(* (unsigned char *) s);
 		s++;
 	}
 }