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-rw-r--r--cpukit/libmisc/monitor/mon-network.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/cpukit/libmisc/monitor/mon-network.c b/cpukit/libmisc/monitor/mon-network.c
index f311b0de09..52c0cd9852 100644
--- a/cpukit/libmisc/monitor/mon-network.c
+++ b/cpukit/libmisc/monitor/mon-network.c
@@ -70,7 +70,7 @@ void mon_ifconfig(int argc, char *argv[],
cur_idx += 1;
} else {
iface = argv[1];
- if (isdigit((int)*argv[2])) {
+ if (isdigit((unsigned char)*argv[2])) {
if (inet_pton(AF_INET, argv[2], &ipaddr.sin_addr) < 0) {
printf("bad ip address: %s\n", argv[2]);
return;