Specify char

1 files changed, 2 insertions, 2 deletions

diff --git a/net.c b/net.c
index e692b49b..10661956 100644
--- a/net.c
+++ b/net.c
@@ -154,8 +154,8 @@ hwaddr_aton(unsigned char *buffer, const char *addr)
 			return 0;
 		}
 		/* Ensure that digits are hex */
-		if (isxdigit((unsigned)c[0]) == 0 ||
-		    isxdigit((unsigned)c[1]) == 0)
+		if (isxdigit((unsigned char)c[0]) == 0 ||
+		    isxdigit((unsigned char)c[1]) == 0)
 		{
 			errno = EINVAL;
 			return 0;