1 files changed, 4 insertions, 0 deletions
diff --git a/src/FurnaceRecipe.cpp b/src/FurnaceRecipe.cpp
index 36dd2d5e9..92b52c6e8 100644
--- a/src/FurnaceRecipe.cpp
+++ b/src/FurnaceRecipe.cpp
@@ -43,6 +43,7 @@ cFurnaceRecipe::~cFurnaceRecipe()
 {
 	ClearRecipes();
 	delete m_pState;
+	m_pState = NULL;
 }
 
 
@@ -243,7 +244,9 @@ void cFurnaceRecipe::ClearRecipes(void)
 	{
 		Recipe R = *itr;
 		delete R.In;
+		R.In = NULL;
 		delete R.Out;
+		R.Out = NULL;
 	}
 	m_pState->Recipes.clear();
 
@@ -251,6 +254,7 @@ void cFurnaceRecipe::ClearRecipes(void)
 	{
 		Fuel F = *itr;
 		delete F.In;
+		F.In = NULL;
 	}
 	m_pState->Fuel.clear();
 }