1 files changed, 1 insertions, 1 deletions
diff --git a/ext/mwrap/mwrap.c b/ext/mwrap/mwrap.c
index 7455c54..2b946b1 100644
--- a/ext/mwrap/mwrap.c
+++ b/ext/mwrap/mwrap.c
@@ -826,7 +826,7 @@ static VALUE cSrcLoc;
  static VALUE mwrap_aref(VALUE mod, VALUE loc)
  {
          const char *str = StringValueCStr(loc);
-        long len = RSTRING_LEN(loc);
+        int len = RSTRING_LENINT(loc);
          struct src_loc *k = 0;
          uintptr_t p;
          struct cds_lfht_iter iter;