diff --git a/Minecraft.Client/Build/Common/UI/UIStructs.h b/Minecraft.Client/Build/Common/UI/UIStructs.h
index ea57b3a1f..611dd9ed3 100644
--- a/Minecraft.Client/Build/Common/UI/UIStructs.h
+++ b/Minecraft.Client/Build/Common/UI/UIStructs.h
@@ -265,7 +265,7 @@ typedef struct _LaunchMoreOptionsMenuInitData
 
 	_LaunchMoreOptionsMenuInitData()
 	{
-		memset(this,0,sizeof(_LaunchMoreOptionsMenuInitData));
+		memset((void*)this,0,sizeof(_LaunchMoreOptionsMenuInitData));
 		bOnlineGame = TRUE;
 		bAllowFriendsOfFriends = TRUE;
 		bPVP = TRUE;
diff --git a/Minecraft.World/Util/ArrayWithLength.h b/Minecraft.World/Util/ArrayWithLength.h
index 5ac619a5d..f2e268766 100644
--- a/Minecraft.World/Util/ArrayWithLength.h
+++ b/Minecraft.World/Util/ArrayWithLength.h
@@ -11,7 +11,7 @@ public:
 	T *data;
 	unsigned int length;
 	arrayWithLength() { data = NULL; length = 0; }
-	arrayWithLength(unsigned int elements, bool bClearArray=true) { assert(elements!=0); data = new T[elements];  if(bClearArray){ memset( data,0,sizeof(T)*elements); }  this->length = elements; }
+	arrayWithLength(unsigned int elements, bool bClearArray=true) { assert(elements!=0); data = new T[elements];  if(bClearArray){ memset( (void*)data,0,sizeof(T)*elements); }  this->length = elements; }
 
 	// 4J Stu Added this ctor so I static init arrays in the Item derivation tree
 	arrayWithLength( T data[], unsigned int elements) { this->data = data; this->length = elements; }
@@ -22,7 +22,7 @@ public:
 	{
 		assert( elements > length );
 		T *temp = new T[elements];
-		memset( temp,0,sizeof(T)*elements);
+		memset( (void*)temp,0,sizeof(T)*elements);
 
 		if( data != NULL )
 		{