1 files changed, 1 insertions, 0 deletions
diff --git a/src/order.h b/src/order.h
index 952cfa760..b9557adce 100644
--- a/src/order.h
+++ b/src/order.h
@@ -11,6 +11,7 @@
 #include "vehicle_type.h"
 #include "tile_type.h"
 #include "date_type.h"
+#include "group_type.h"
 
 typedef uint16 DestinationID;