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-rw-r--r--newgrf_engine.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/newgrf_engine.c b/newgrf_engine.c
index ebaa15c1d..6f6a94108 100644
--- a/newgrf_engine.c
+++ b/newgrf_engine.c
@@ -7,6 +7,7 @@
#include "string.h"
#include "strings.h"
#include "engine.h"
+#include "newgrf_callbacks.h"
#include "newgrf_engine.h"
#include "sprite.h"
#include "variables.h"