1 files changed, 1 insertions, 1 deletions
diff --git a/vm_core.h b/vm_core.h
index a42c8b7170..5baf60faf5 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -738,7 +738,7 @@ typedef struct {
 
     VALUE envval;		/* for GC mark */
     VALUE blockprocval;
-    int8_t safe_level;		/* 0..4 */
+    int8_t safe_level;		/* 0..3 */
     int8_t is_from_method;	/* bool */
     int8_t is_lambda;		/* bool */
 } rb_proc_t;