1 files changed, 2 insertions, 2 deletions
diff --git a/airport.h b/airport.h
index 5242f995a..ef68a2f9f 100644
--- a/airport.h
+++ b/airport.h
@@ -44,8 +44,8 @@ typedef struct AirportFTA {
 	struct AirportFTA *next_in_chain;	// possible extra movement choices from this position
 } AirportFTA;
 
-void InitializeAirports();
-void UnInitializeAirports();
+void InitializeAirports(void);
+void UnInitializeAirports(void);
 const AirportFTAClass* GetAirport(const byte airport_type);
 
 #endif /* AIRPORT_H */