1 files changed, 1 insertions, 0 deletions
diff --git a/eval.c b/eval.c
index 0140ed7d88..e9b953044e 100644
--- a/eval.c
+++ b/eval.c
@@ -2545,6 +2545,7 @@ set_trace_func(obj, trace)
 {
     rb_event_hook_t *hook;
 
+    rb_secure(4);
     if (NIL_P(trace)) {
 	trace_func = 0;
 	rb_remove_event_hook(call_trace_func);