diff --git a/game/operation/operation.py b/game/operation/operation.py
index e389ad3f..ae9524b8 100644
--- a/game/operation/operation.py
+++ b/game/operation/operation.py
@@ -1,5 +1,6 @@
 from dcs.countries import country_dict
 from dcs.lua.parse import loads
+from dcs.terrain import Terrain
 
 from gen import *
 from userdata.debriefing import *