1 files changed, 12 insertions, 3 deletions

diff --git a/plugins/utils.c b/plugins/utils.c
index e871c5f..aff1790 100644
--- a/plugins/utils.c
+++ b/plugins/utils.c
@@ -258,16 +258,25 @@ bool is_int64(char *number, int64_t *target) {
  */
 bool is_uint64(char *number, uint64_t *target) {
         errno = 0;
-        uint64_t tmp = strtoll(number, NULL, 10);
+        char *endptr = { 0 };
+        unsigned long long tmp = strtoull(number, &endptr, 10);
+
         if (errno != 0) {
                 return false;
         }
-        if (tmp < 0 || tmp > UINT64_MAX) {
+
+        if (*endptr != '\0') {
                 return false;
         }
+
+        if (tmp > UINT64_MAX) {
+                return false;
+        }
+
         if (target != NULL) {
-                *target = tmp;
+                *target = (uint64_t)tmp;
         }
+
         return true;
 }