diff --git a/Minecraft.World/Recipes/Recipes.cpp b/Minecraft.World/Recipes/Recipes.cpp
index 206b62ef3..66eab96cd 100644
--- a/Minecraft.World/Recipes/Recipes.cpp
+++ b/Minecraft.World/Recipes/Recipes.cpp
@@ -1217,4 +1217,4 @@ void Recipes::buildRecipeIngredientsArray(void)
 Recipy::INGREDIENTS_REQUIRED *Recipes::getRecipeIngredientsArray(void)
 {
 	return m_pRecipeIngredientsRequired;
-}
\ No newline at end of file
+}
diff --git a/Minecraft.World/Recipes/ShapedRecipy.cpp b/Minecraft.World/Recipes/ShapedRecipy.cpp
index 65a1c7d68..b33d10153 100644
--- a/Minecraft.World/Recipes/ShapedRecipy.cpp
+++ b/Minecraft.World/Recipes/ShapedRecipy.cpp
@@ -141,11 +141,14 @@ void ShapedRecipy::requires(INGREDIENTS_REQUIRED *pIngReq)
 	TempIngReq.iIngC=0;
 	TempIngReq.iType = ((width>2) ||(height>2))?RECIPE_TYPE_3x3:RECIPE_TYPE_2x2; // 3x3
 	// 3x3
+	// 4jcraft, genuinly what is this garbage code
 	TempIngReq.uiGridA = new unsigned int [9];
 	TempIngReq.iIngIDA= new int [9];
 	TempIngReq.iIngValA = new int [9];
 	TempIngReq.iIngAuxValA = new int [9];
 
+	// 4jcraft,yes, yes!! 
+	// use winapi and inbetween use a cstd function u could have used!
 	ZeroMemory(TempIngReq.iIngIDA,sizeof(int)*9);
 	ZeroMemory(TempIngReq.iIngValA,sizeof(int)*9);
 	memset(TempIngReq.iIngAuxValA,Recipes::ANY_AUX_VALUE,sizeof(int)*9);
@@ -162,7 +165,8 @@ void ShapedRecipy::requires(INGREDIENTS_REQUIRED *pIngReq)
 				if (expected!=NULL) 
 				{			
 					int iAuxVal = expected->getAuxValue();
-					TempIngReq.uiGridA[x+y*3]=expected->id | iAuxVal<<24;
+					//4jcraft, added cast to uint (shift of negativ num, undefined)
+					TempIngReq.uiGridA[x+y*3]=expected->id | (unsigned int) iAuxVal<<24;
 
 					bFound=false;
 					for(j=0;j<TempIngReq.iIngC;j++)
@@ -227,4 +231,4 @@ ShapedRecipy *ShapedRecipy::keepTag()
 {
 	_keepTag = true;
 	return this;
-}
\ No newline at end of file
+}
diff --git a/Minecraft.World/Recipes/ShapelessRecipy.cpp b/Minecraft.World/Recipes/ShapelessRecipy.cpp
index 7da043bc0..4c3b567a4 100644
--- a/Minecraft.World/Recipes/ShapelessRecipy.cpp
+++ b/Minecraft.World/Recipes/ShapelessRecipy.cpp
@@ -128,7 +128,8 @@ void ShapelessRecipy::requires(INGREDIENTS_REQUIRED *pIngReq)
 		if (expected!=NULL) 
 		{			
 			int iAuxVal = (*ingredient)->getAuxValue();
-			TempIngReq.uiGridA[iCount++]=expected->id | iAuxVal<<24;
+			//4jcraft, added cast to uint, shift of negative int is undefined
+			TempIngReq.uiGridA[iCount++]=expected->id | (unsigned int) iAuxVal<<24;
 			// 4J-PB - put the ingredients in boxes 1,2,4,5 so we can see them in a 2x2 crafting screen
 			if(iCount==2) iCount=3;
 			bFound=false;
@@ -179,4 +180,4 @@ void ShapelessRecipy::requires(INGREDIENTS_REQUIRED *pIngReq)
 	delete [] TempIngReq.iIngValA;
 	delete [] TempIngReq.iIngAuxValA;
 	delete [] TempIngReq.uiGridA;
-}
\ No newline at end of file
+}
diff --git a/Minecraft.World/Util/Random.cpp b/Minecraft.World/Util/Random.cpp
index 5be1d53d3..00c4403aa 100644
--- a/Minecraft.World/Util/Random.cpp
+++ b/Minecraft.World/Util/Random.cpp
@@ -33,7 +33,9 @@ void Random::setSeed(__int64 s)
 
 int Random::next(int bits)
 {
-    seed = (seed * 0x5DEECE66DLL + 0xBLL) & ((1LL << 48) - 1);
+	// 4jcraft, cast to uint64_t for modulo arithmethic
+	// overflow of int undefined, and its guaranteed here.
+    seed = ((uint64_t) seed * 0x5DEECE66DLL + 0xBLL) & ((1LL << 48) - 1);
     return (int)(seed >> (48 - bits));
 }