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-rw-r--r--src/mame/includes/pingpong.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mame/includes/pingpong.h b/src/mame/includes/pingpong.h
index bac709a81fd..fb43d757c0a 100644
--- a/src/mame/includes/pingpong.h
+++ b/src/mame/includes/pingpong.h
@@ -1,5 +1,8 @@
// license:BSD-3-Clause
// copyright-holders:Jarek Parchanski
+
+#include "machine/timer.h"
+
class pingpong_state : public driver_device
{
public: