1 files changed, 1 insertions, 1 deletions
diff --git a/eval.c b/eval.c
index 8040e8b585..e2540cae1b 100644
--- a/eval.c
+++ b/eval.c
@@ -125,7 +125,7 @@ ruby_finalize(void)
 void rb_thread_stop_timer_thread(void);
 
 int
-ruby_cleanup(int ex)
+ruby_cleanup(volatile int ex)
 {
     int state;
     volatile VALUE errs[2];