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-rw-r--r--src/newgrf_callbacks.h6
1 files changed, 2 insertions, 4 deletions
diff --git a/src/newgrf_callbacks.h b/src/newgrf_callbacks.h
index 0513907a3..4c4a56953 100644
--- a/src/newgrf_callbacks.h
+++ b/src/newgrf_callbacks.h
@@ -341,9 +341,7 @@ enum AirportTileCallbackMask {
/**
* Different values for Callback result evaluations
*/
-enum {
- CALLBACK_FAILED = 0xFFFF, ///< Result of a failed callback.
- CALLBACK_HOUSEPRODCARGO_END = 0x20FF, ///< Sentinel indicating that the loop for CBID_HOUSE_PRODUCE_CARGO has ended
-};
+static const uint CALLBACK_FAILED = 0xFFFF; ///< Result of a failed callback.
+static const uint CALLBACK_HOUSEPRODCARGO_END = 0x20FF; ///< Sentinel indicating that the loop for CBID_HOUSE_PRODUCE_CARGO has ended
#endif /* NEWGRF_CALLBACKS_H */