diff --git a/ChangeLog b/ChangeLog
index 023307e362..82306bbf4b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Sun Jul  6 21:30:35 2014  Koichi Sasada  <ko1@atdot.net>
+
+	* gc.c (is_dying_object): fix missed condition.
+
+	* gc.c (is_live_object): move frequent path first.
+
 Sun Jul  6 21:00:11 2014  Koichi Sasada  <ko1@atdot.net>
 
 	* gc.c: rename is_dead_object() to is_dying_object().
diff --git a/gc.c b/gc.c
index cb14033717..2d0ba1d61d 100644
--- a/gc.c
+++ b/gc.c
@@ -2333,7 +2333,7 @@ static inline int
 is_dying_object(rb_objspace_t *objspace, VALUE ptr)
 {
     if (!is_lazy_sweeping(heap_eden) ||
-	!is_swept_object(objspace, ptr) ||
+	is_swept_object(objspace, ptr) ||
 	MARKED_IN_BITMAP(GET_HEAP_MARK_BITS(ptr), ptr)) {
 
 	return FALSE;
@@ -2352,11 +2352,11 @@ is_live_object(rb_objspace_t *objspace, VALUE ptr)
 	return FALSE;
     }
 
-    if (is_dying_object(objspace, ptr)) {
-	return FALSE;
+    if (!is_dying_object(objspace, ptr)) {
+	return TRUE;
     }
     else {
-	return TRUE;
+	return FALSE;
     }
 }