diff options
Diffstat (limited to 'src/utils.c')
| -rw-r--r-- | src/utils.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/utils.c b/src/utils.c index 7b7178ca..7364bfb1 100644 --- a/src/utils.c +++ b/src/utils.c @@ -999,7 +999,7 @@ char osmo_luhn(const char* in, int in_len) /* All input must be numbers */ for (i = 0; i < in_len; i++) { - if (!isdigit(in[i])) + if (!isdigit((unsigned char)in[i])) return -EINVAL; } |