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-rw-r--r--src/ai/api/ai_tunnel.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/ai/api/ai_tunnel.cpp b/src/ai/api/ai_tunnel.cpp
index 65689a513..59055af2f 100644
--- a/src/ai/api/ai_tunnel.cpp
+++ b/src/ai/api/ai_tunnel.cpp
@@ -9,6 +9,7 @@
/** @file ai_tunnel.cpp Implementation of AITunnel. */
+#include "../../stdafx.h"
#include "ai_tunnel.hpp"
#include "ai_rail.hpp"
#include "../ai_instance.hpp"