diff --git a/Source/Core/Core/PowerPC/JitCommon/JitCache.cpp b/Source/Core/Core/PowerPC/JitCommon/JitCache.cpp
index 49ffa7c69b..30856fb48f 100644
--- a/Source/Core/Core/PowerPC/JitCommon/JitCache.cpp
+++ b/Source/Core/Core/PowerPC/JitCommon/JitCache.cpp
@@ -108,7 +108,10 @@ using namespace Gen;
 		}
 		links_to.clear();
 		block_map.clear();
-		valid_block.reset();
+		
+		valid_block.clear();
+		valid_block.resize(VALID_BLOCK_MASK_SIZE, false);
+
 		num_blocks = 0;
 		memset(blockCodePointers, 0, sizeof(u8*)*MAX_NUM_BLOCKS);
 	}
@@ -349,7 +352,7 @@ using namespace Gen;
 		// Optimize the common case of length == 32 which is used by Interpreter::dcb*
 		bool destroy_block = true;
 		if (length == 32)
-	{
+		{
 			if (!valid_block[pAddr / 32])
 				destroy_block = false;
 			else
@@ -362,7 +365,7 @@ using namespace Gen;
 		{
 			std::map<pair<u32,u32>, u32>::iterator it1 = block_map.lower_bound(std::make_pair(pAddr, 0)), it2 = it1;
 			while (it2 != block_map.end() && it2->first.second < pAddr + length)
-		{
+			{
 				JitBlock &b = blocks[it2->second];
 				*GetICachePtr(b.originalAddress) = JIT_ICACHE_INVALID_WORD;
 				DestroyBlock(it2->second, true);
diff --git a/Source/Core/Core/PowerPC/JitCommon/JitCache.h b/Source/Core/Core/PowerPC/JitCommon/JitCache.h
index 968cdaf142..0837dd371a 100644
--- a/Source/Core/Core/PowerPC/JitCommon/JitCache.h
+++ b/Source/Core/Core/PowerPC/JitCommon/JitCache.h
@@ -72,10 +72,11 @@ class JitBaseBlockCache
 	int num_blocks;
 	std::multimap<u32, int> links_to;
 	std::map<std::pair<u32,u32>, u32> block_map; // (end_addr, start_addr) -> number
-	std::bitset<0x20000000 / 32> valid_block;
+	std::vector<bool> valid_block;
 	enum
 	{
-		MAX_NUM_BLOCKS = 65536*2
+		MAX_NUM_BLOCKS = 65536*2,
+		VALID_BLOCK_MASK_SIZE = 0x20000000 / 32,
 	};
 
 	bool RangeIntersect(int s1, int e1, int s2, int e2) const;