1 files changed, 2 insertions, 0 deletions
diff --git a/ruby.h b/ruby.h
index abf9e11085..a646c6a690 100644
--- a/ruby.h
+++ b/ruby.h
@@ -224,6 +224,8 @@ VALUE rb_ull2inum _((unsigned LONG_LONG));
 
 #define TYPE(x) rb_type((VALUE)(x))
 
+#define RB_GC_GUARD(v) (*(volatile VALUE *)&(v))
+
 void rb_check_type _((VALUE,int));
 #define Check_Type(v,t) rb_check_type((VALUE)(v),t)