diff --git a/Tools/MCADefrag/Globals.h b/Tools/MCADefrag/Globals.h
index f70a90d17..6593187e6 100644
--- a/Tools/MCADefrag/Globals.h
+++ b/Tools/MCADefrag/Globals.h
@@ -240,6 +240,7 @@ template <typename Type> class cItemCallback
 public:
 	/// Called for each item in the internal list; return true to stop the loop, or false to continue enumerating
 	virtual bool Item(Type * a_Type) = 0;
+	virtual ~cItemCallback() {};
 } ;
 
 
diff --git a/src/Server.cpp b/src/Server.cpp
index aa731cdd2..66bccd680 100644
--- a/src/Server.cpp
+++ b/src/Server.cpp
@@ -107,10 +107,16 @@ void cServer::cTickThread::Execute(void)
 cServer::cServer(void) :
 	m_ListenThreadIPv4(*this, cSocket::IPv4, "Client IPv4"),
 	m_ListenThreadIPv6(*this, cSocket::IPv6, "Client IPv6"),
+	m_PlayerCount(0),
+	m_PlayerCountDiff(0),
+	m_ClientViewDistance(0),
 	m_bIsConnected(false),
 	m_bRestarting(false),
 	m_RCONServer(*this),
-	m_TickThread(*this)
+	m_MaxPlayers(0),
+	m_bIsHardcore(false),
+	m_TickThread(*this),
+	m_ShouldAuthenticate(false)
 {
 }
 
diff --git a/src/Simulator/IncrementalRedstoneSimulator.cpp b/src/Simulator/IncrementalRedstoneSimulator.cpp
index 51a7c2886..f4355b33b 100644
--- a/src/Simulator/IncrementalRedstoneSimulator.cpp
+++ b/src/Simulator/IncrementalRedstoneSimulator.cpp
@@ -17,8 +17,14 @@
 
 	
 
-cIncrementalRedstoneSimulator::cIncrementalRedstoneSimulator(cWorld & a_World)
-	: super(a_World)
+cIncrementalRedstoneSimulator::cIncrementalRedstoneSimulator(cWorld & a_World) :
+	super(a_World),
+	m_RedstoneSimulatorChunkData(),
+	m_PoweredBlocks(),
+	m_LinkedPoweredBlocks(),
+	m_SimulatedPlayerToggleableBlocks(),
+	m_RepeatersDelayList(),
+	m_Chunk()
 {
 }
 
diff --git a/src/UI/Window.cpp b/src/UI/Window.cpp
index 46885390b..98a9a0cec 100644
--- a/src/UI/Window.cpp
+++ b/src/UI/Window.cpp
@@ -854,6 +854,7 @@ void cAnvilWindow::GetBlockPos(int & a_PosX, int & a_PosY, int & a_PosZ)
 
 cEnchantingWindow::cEnchantingWindow(int a_BlockX, int a_BlockY, int a_BlockZ) :
 	cWindow(wtEnchantment, "Enchant"),
+	m_SlotArea(),
 	m_BlockX(a_BlockX),
 	m_BlockY(a_BlockY),
 	m_BlockZ(a_BlockZ)