diff --git a/ChangeLog b/ChangeLog
index d8b83cd83a..fca0563a07 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Nov 26 19:29:52 2013  Koichi Sasada  <ko1@atdot.net>
+
+	* common.mk: add useful config "set breakpoint pending on"
+	  for run.gdb.
+
 Tue Nov 26 19:17:47 2013  Koichi Sasada  <ko1@atdot.net>
 
 	* ext/objspace/object_tracing.c (newobj_i): skip class_path if class
diff --git a/common.mk b/common.mk
index e94c4756ea..1bd7ccf50c 100644
--- a/common.mk
+++ b/common.mk
@@ -1015,7 +1015,8 @@ tbench: $(PROGRAM) PHONY
 	            --pattern='bmx_' --directory=$(srcdir)/benchmark $(OPTS)
 
 run.gdb:
-	echo b ruby_debug_breakpoint           > run.gdb
+	echo set breakpoint pending on         > run.gdb
+	echo b ruby_debug_breakpoint          >> run.gdb
 	echo '# handle SIGINT nostop'         >> run.gdb
 	echo '# handle SIGPIPE nostop'        >> run.gdb
 	echo '# b rb_longjmp'                 >> run.gdb