diff --git a/ChangeLog b/ChangeLog
index 229863930f..9a6b02ab72 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Jun 19 07:47:48 2013  Koichi Sasada  <ko1@atdot.net>
+
+	* gc.c (garbage_collect_body): use FIX2INT for ruby_gc_stress.
+
 Wed Jun 19 07:44:31 2013  Koichi Sasada  <ko1@atdot.net>
 
 	* gc.c (rb_objspace::gc_stress): int -> VALUE to store Fixnum object.
diff --git a/gc.c b/gc.c
index f855952229..cd2bf11fd5 100644
--- a/gc.c
+++ b/gc.c
@@ -3871,7 +3871,7 @@ garbage_collect_body(rb_objspace_t *objspace, int full_mark, int immediate_sweep
 	immediate_sweep = TRUE;
 
 	if (FIXNUM_P(ruby_gc_stress)) {
-	    int flag = ruby_gc_stress;
+	    int flag = FIX2INT(ruby_gc_stress);
 
 	    if (flag & 0x01) minor_gc = TRUE;
 	    if (flag & 0x02) immediate_sweep = FALSE;