diff --git a/src/Simulator/IncrementalRedstoneSimulator.cpp b/src/Simulator/IncrementalRedstoneSimulator.cpp
index 074063add..8d29fbec7 100644
--- a/src/Simulator/IncrementalRedstoneSimulator.cpp
+++ b/src/Simulator/IncrementalRedstoneSimulator.cpp
@@ -18,7 +18,13 @@
 	
 
 cIncrementalRedstoneSimulator::cIncrementalRedstoneSimulator(cWorld & a_World)
-	: super(a_World)
+	: super(a_World),
+	  m_RedstoneSimulatorChunkData(),
+	  m_PoweredBlocks(),
+	  m_LinkedPoweredBlocks(),
+	  m_SimulatedPlayerToggleableBlocks(),
+	  m_RepeatersDelayList(),
+	  m_Chunk()
 {
 }