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-rw-r--r--src/economy.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/economy.cpp b/src/economy.cpp
index bdef0a6c1..ca6177c34 100644
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -43,6 +43,7 @@
#include "track_type.h"
#include "track_func.h"
#include "rail_map.h"
+#include "signal_func.h"
#include "gfx_func.h"
/**