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-rw-r--r--lib/filter.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/filter.c b/lib/filter.c
index 14b89217b8..fe62ca1c13 100644
--- a/lib/filter.c
+++ b/lib/filter.c
@@ -273,7 +273,7 @@ static struct access_list *access_list_insert(afi_t afi, const char *name)
/* If name is made by all digit character. We treat it as
number. */
for (number = 0, i = 0; i < strlen(name); i++) {
- if (isdigit((int)name[i]))
+ if (isdigit((unsigned char)name[i]))
number = (number * 10) + (name[i] - '0');
else
break;