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-rw-r--r--newgrf_engine.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/newgrf_engine.c b/newgrf_engine.c
index 519977c94..de61aa01a 100644
--- a/newgrf_engine.c
+++ b/newgrf_engine.c
@@ -765,7 +765,7 @@ bool UsesWagonOverride(const Vehicle* v)
* @param vehicle The vehicle to evaluate the callback for, or NULL if it doesnt exist yet
* @return The value the callback returned, or CALLBACK_FAILED if it failed
*/
-uint16 GetVehicleCallback(byte callback, uint32 param1, uint32 param2, EngineID engine, const Vehicle *v)
+uint16 GetVehicleCallback(uint16 callback, uint32 param1, uint32 param2, EngineID engine, const Vehicle *v)
{
const SpriteGroup *group;
ResolverObject object;