diff -r 9a0b1288315e -r 5083fb0a2992 share/hedgewars/Data/Missions/Campaign/A_Classic_Fairytale/dragon.lua
--- a/share/hedgewars/Data/Missions/Campaign/A_Classic_Fairytale/dragon.lua	Fri Mar 09 18:03:59 2018 +0100
+++ b/share/hedgewars/Data/Missions/Campaign/A_Classic_Fairytale/dragon.lua	Fri Mar 09 19:05:59 2018 +0100
@@ -551,7 +551,7 @@
 
 function GetVariables()
   progress = tonumber(GetCampaignVar("Progress"))
-  m5DeployedNum = tonumber(GetCampaignVar("M5DeployedNum"))
+  m5DeployedNum = tonumber(GetCampaignVar("M5DeployedNum")) or leaksNum
 end
 
 function SetupPlace()