diff --git a/ChangeLog b/ChangeLog
index 5092137b5e..44810c2bad 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Fri Dec  6 15:24:30 2013  Koichi Sasada  <ko1@atdot.net>
+
+	* gc.c (gc_start_internal, rb_gc): do not need 
+	  heap_pages_free_unused_pages() here.
+	  It was done in after_sweep().
+
+	* gc.c (rb_gc): The reason is now GPR_FLAG_CAPI.
+
 Fri Dec  6 14:05:19 2013  Aman Gupta <ruby@tmm1.net>
 
 	* gc.c (gc_start_internal): GC.start() now accepts two optional
diff --git a/gc.c b/gc.c
index fc4048943d..11abde8b2f 100644
--- a/gc.c
+++ b/gc.c
@@ -5039,7 +5039,6 @@ gc_start_internal(int argc, VALUE *argv, VALUE self)
 
     garbage_collect(objspace, full_mark, immediate_sweep, GPR_FLAG_METHOD);
     if (!finalizing) finalize_deferred(objspace);
-    heap_pages_free_unused_pages(objspace);
 
     return Qnil;
 }
@@ -5055,9 +5054,8 @@ void
 rb_gc(void)
 {
     rb_objspace_t *objspace = &rb_objspace;
-    garbage_collect(objspace, TRUE, TRUE, GPR_FLAG_METHOD);
+    garbage_collect(objspace, TRUE, TRUE, GPR_FLAG_CAPI);
     if (!finalizing) finalize_deferred(objspace);
-    heap_pages_free_unused_pages(objspace);
 }
 
 int