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-rw-r--r--src/transparency.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/transparency.h b/src/transparency.h
index f2945682e..3b5cd5ebe 100644
--- a/src/transparency.h
+++ b/src/transparency.h
@@ -13,6 +13,7 @@
#define TRANSPARENCY_H
#include "gfx_func.h"
+#include "openttd.h"
/**
* Transparency option bits: which position in _transparency_opt stands for which transparency.