diff --git a/ChangeLog b/ChangeLog
index 863e3094ac..e2ef18565c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Wed Jun  5 15:26:10 2013  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* gc.c (before_gc_sweep): don't optimize it to avoid segv on Ubuntu
+	  10.04 gcc 4.4.
+	  http://u32.rubyci.org/~chkbuild/ruby-trunk/log/20130527T190301Z.diff.html.gz
+
 Wed Jun  5 09:46:46 2013  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* test/fileutils/test_fileutils.rb (TestFileUtils#test_mkdir): add
diff --git a/gc.c b/gc.c
index f3fb37207b..6e56e11022 100644
--- a/gc.c
+++ b/gc.c
@@ -2276,6 +2276,10 @@ ready_to_gc(rb_objspace_t *objspace)
     return TRUE;
 }
 
+#if defined(__GNUC__) && __GNUC__ == 4 && __GNUC_MINOR__ == 4
+# pragma GCC push_options
+# pragma GCC optimize ("O0")
+#endif
 static void
 before_gc_sweep(rb_objspace_t *objspace)
 {
@@ -2297,6 +2301,9 @@ before_gc_sweep(rb_objspace_t *objspace)
 	rb_sweep_method_entry(GET_VM());
     }
 }
+#if defined(__GNUC__) && __GNUC__ == 4 && __GNUC_MINOR__ == 4
+# pragma GCC pop_options
+#endif
 
 static void
 after_gc_sweep(rb_objspace_t *objspace)