1 files changed, 1 insertions, 1 deletions
diff --git a/src/error.c b/src/error.c
index 2c4fd1a40..8e679cbb1 100644
--- a/src/error.c
+++ b/src/error.c
@@ -71,7 +71,7 @@ exc_exception(mrb_state *mrb, mrb_value self)
 {
   mrb_value exc;
   mrb_value a;
-  int argc;
+  mrb_int argc;
 
   argc = mrb_get_args(mrb, "|o", &a);
   if (argc == 0) return self;