diff --git a/tests/Redstone/creatable.cpp b/tests/Redstone/creatable.cpp
index f26ebe85c..02c622788 100644
--- a/tests/Redstone/creatable.cpp
+++ b/tests/Redstone/creatable.cpp
@@ -99,6 +99,7 @@ class MockChunk
 {
 public:
 	cRedstoneSimulatorChunkData * GetRedstoneSimulatorData() { return NULL; }
+	void SetRedstoneSimulatorData(cRedstoneSimulatorChunkData * a_Data) {}
 	bool IsRedstoneDirty() { return true; }
 	void SetIsRedstoneDirty(bool a_Param) {}