diff --git a/src/util/src/tutil.c b/src/util/src/tutil.c
index 019690bf37b0bc5dd526f57fe9f8c891980ad93e..05778437475eaa886e30c314933e483276b87ccb 100644
--- a/src/util/src/tutil.c
+++ b/src/util/src/tutil.c
@@ -226,7 +226,7 @@ int64_t strnatoi(char *num, int32_t len) {
       } else {
         return 0;
       }
-      ret = dig * base;
+      ret += dig * base;
     }
   } else {
     for (i = len - 1; i >= 0; --i, base *= 10) {