diff --git a/libsrc/common/strtol.c b/libsrc/common/strtol.c
index b7ccdf24c..f3ce08a35 100644
--- a/libsrc/common/strtol.c
+++ b/libsrc/common/strtol.c
@@ -102,7 +102,7 @@ long __fastcall__ strtol (const char* nptr, char** endptr, int base)
      */
     if (endptr) {
         if (CvtCount > 0) {
-            *endptr = (char*) S - 1;
+            *endptr = (char*) S;
         } else {
             *endptr = (char*) nptr;
         }