diff --git a/src/Simulator/FireSimulator.h b/src/Simulator/FireSimulator.h
index 59cc62540..66c31b440 100644
--- a/src/Simulator/FireSimulator.h
+++ b/src/Simulator/FireSimulator.h
@@ -27,8 +27,8 @@ public:
 
 	virtual bool IsAllowedBlock(BLOCKTYPE a_BlockType) override;
 
-	bool IsFuel   (BLOCKTYPE a_BlockType);
-	bool DoesBurnForever(BLOCKTYPE a_BlockType);
+	static bool IsFuel   (BLOCKTYPE a_BlockType);
+	static bool DoesBurnForever(BLOCKTYPE a_BlockType);
 
 protected:
 	/// Time (in msec) that a fire block takes to burn with a fuel block into the next step