diff --git a/ChangeLog b/ChangeLog
index db2f37e899..8f49704f95 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Feb 16 22:09:27 2010  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* gc.c (chain_finalized_object): fix precedence.
+
 Tue Feb 16 21:32:01 2010  Yusuke Endoh  <mame@tsg.ne.jp>
 
 	* gc.c (rb_objspace_call_finalizer): always run finalizer at exit,
diff --git a/gc.c b/gc.c
index f213500192..7490d4d8c7 100644
--- a/gc.c
+++ b/gc.c
@@ -2623,7 +2623,7 @@ static int
 chain_finalized_object(st_data_t key, st_data_t val, st_data_t arg)
 {
     RVALUE *p = (RVALUE *)key, **final_list = (RVALUE **)arg;
-    if (p->as.basic.flags & (FL_FINALIZE|FL_MARK) == FL_FINALIZE) {
+    if ((p->as.basic.flags & (FL_FINALIZE|FL_MARK)) == FL_FINALIZE) {
 	if (BUILTIN_TYPE(p) != T_ZOMBIE) {
 	    p->as.free.flags = FL_MARK | T_ZOMBIE; /* remain marked */
 	    RDATA(p)->dfree = 0;