1 files changed, 2 insertions, 0 deletions
diff --git a/newgrf.h b/newgrf.h
index 2cefa9c84..1d8c5a365 100644
--- a/newgrf.h
+++ b/newgrf.h
@@ -68,4 +68,6 @@ void LoadNewGRFFile(GRFConfig *config, uint file_index, GrfLoadingStage stage);
 void LoadNewGRF(uint load_index, uint file_index);
 void ReloadNewGRFData(void); // in openttd.c
 
+void CDECL grfmsg(int severity, const char *str, ...);
+
 #endif /* NEWGRF_H */