1 files changed, 7 insertions, 0 deletions
diff --git a/safe.c b/safe.c
index 030b473ddd..d9ded85b89 100644
--- a/safe.c
+++ b/safe.c
@@ -25,6 +25,13 @@
 
 #undef rb_secure
 #undef rb_set_safe_level
+#undef ruby_safe_level_4_warning
+
+int
+ruby_safe_level_4_warning(void)
+{
+    return 4;
+}
 
 int
 rb_safe_level(void)