diff --git a/VCMI_global.props b/VCMI_global.props
index 8197ea294..40df06ece 100644
--- a/VCMI_global.props
+++ b/VCMI_global.props
@@ -12,6 +12,9 @@
     <Link>
       <SubSystem>Console</SubSystem>
     </Link>
+    <ClCompile>
+      <DisableSpecificWarnings>4275</DisableSpecificWarnings>
+    </ClCompile>
   </ItemDefinitionGroup>
   <ItemGroup />
 </Project>
\ No newline at end of file
diff --git a/lib/CCreatureHandler.h b/lib/CCreatureHandler.h
index 686f9257b..c82aaa9c4 100644
--- a/lib/CCreatureHandler.h
+++ b/lib/CCreatureHandler.h
@@ -176,7 +176,7 @@ public:
 	template <typename Handler> void serialize(Handler &h, const int version)
 	{
 		//TODO: should be optimized, not all these informations needs to be serialized (same for ccreature)
-		h & notUsedMonsters & creatures;
+		h & notUsedMonsters & doubledCreatures & creatures;
 		h & stackBonuses & expRanks & maxExpPerBattle & expAfterUpgrade;
 		h & skillLevels & skillRequirements & commanderLevelPremy;
 		h & allCreatures;
diff --git a/lib/Connection.h b/lib/Connection.h
index 547c8d553..d4ae9707c 100644
--- a/lib/Connection.h
+++ b/lib/Connection.h
@@ -26,7 +26,7 @@
 #include "CObjectHandler.h" //for CArmedInstance
 #include "Mapping/CCampaignHandler.h" //for CCampaignState
 
-const ui32 version = 738;
+const ui32 version = 739;
 
 class CConnection;
 class CGObjectInstance;
diff --git a/server/CGameHandler.cpp b/server/CGameHandler.cpp
index 8688a07b2..c397de950 100644
--- a/server/CGameHandler.cpp
+++ b/server/CGameHandler.cpp
@@ -1209,12 +1209,17 @@ void CGameHandler::newTurn()
 						std::pair<int,CreatureID> newMonster(54, VLC->creh->pickRandomMonster(boost::ref(rand)));
 						n.creatureid = newMonster.second;
 					}
-					else
+					else if(VLC->creh->doubledCreatures.size())
 					{
 						auto it = VLC->creh->doubledCreatures.cbegin();
 						std::advance (it, rand() % VLC->creh->doubledCreatures.size()); //picking random element of set is tiring
 						n.creatureid = *it;
 					}
+					else
+					{
+						complain("Cannot find creature that can be spawned!");
+						n.specialWeek = NewTurn::NORMAL;
+					}
 				}
 				else if (monthType < 50)
 					n.specialWeek = NewTurn::PLAGUE;