1 files changed, 1 insertions, 0 deletions
diff --git a/airport.h b/airport.h
index 5b0a86907..09c7a4881 100644
--- a/airport.h
+++ b/airport.h
@@ -2,6 +2,7 @@
 #define AIRPORT_H
 
 #include "airport_movement.h"
+#include "variables.h"
 
 enum {MAX_TERMINALS = 6};
 enum {MAX_HELIPADS  = 2};