diff --git a/Extras/Serialize/BulletFileLoader/bFile.cpp b/Extras/Serialize/BulletFileLoader/bFile.cpp
index 849c98f31..ff7c4fe92 100644
--- a/Extras/Serialize/BulletFileLoader/bFile.cpp
+++ b/Extras/Serialize/BulletFileLoader/bFile.cpp
@@ -183,7 +183,8 @@ void bFile::parseInternal(bool verboseDumpAllTypes, char* memDna,int memDnaLengt
 		return;
 
 	char *blenderData = mFileBuffer;
-	int sdnaPos=0;
+	bChunkInd dna;
+	dna.oldPtr = 0;
 
 	char *tempBuffer = blenderData;
 	for (int i=0; i<mFileLen; i++)
@@ -193,15 +194,43 @@ void bFile::parseInternal(bool verboseDumpAllTypes, char* memDna,int memDnaLengt
 
 		if (!mDataStart && strncmp(tempBuffer, "REND", 4)==0)
 			mDataStart = i;
-		if (!sdnaPos && strncmp(tempBuffer, "SDNANAME", 8)==0)
-			sdnaPos = i;
 
-		if (mDataStart && sdnaPos) break;
+		if (strncmp(tempBuffer, "DNA1", 4)==0)
+		{
+			// read the DNA1 block and extract SDNA
+			if (getNextBlock(&dna, tempBuffer, mFlags) > 0)
+			{
+				if (strncmp((tempBuffer + ChunkUtils::getOffset(mFlags)), "SDNANAME", 8) ==0) 
+					dna.oldPtr = (tempBuffer + ChunkUtils::getOffset(mFlags));
+				else dna.oldPtr = 0;
+			}
+			else dna.oldPtr = 0;
+		} 
+		// Some Bullet files are missing the DNA1 block
+		// In Blender it's DNA1 + ChunkUtils::getOffset() + SDNA + NAME
+		// In Bullet tests its SDNA + NAME
+		else if (strncmp(tempBuffer, "SDNANAME", 8) ==0)
+		{
+			dna.oldPtr = blenderData + i;
+			dna.len = mFileLen-i;
+
+			// Also no REND block, so exit now.  
+			if (mVersion==276) break;
+		}
+
+        if (mDataStart && dna.oldPtr) break;
 		tempBuffer++;
 	}
+	if (!dna.oldPtr || !dna.len)
+	{
+		printf("Failed to find DNA1+SDNA pair\n");
+		mFlags &= ~FD_OK;
+		return;
+	}
+
 
 	mFileDNA = new bDNA();
-	mFileDNA->init(blenderData+sdnaPos, mFileLen-sdnaPos, (mFlags & FD_ENDIAN_SWAP)!=0);
+	mFileDNA->init((char*)dna.oldPtr, dna.len, (mFlags & FD_ENDIAN_SWAP)!=0);
 
 	if (mVersion==276)
 	{
diff --git a/src/LinearMath/btSerializer.h b/src/LinearMath/btSerializer.h
index 57f4c1e9e..855313830 100644
--- a/src/LinearMath/btSerializer.h
+++ b/src/LinearMath/btSerializer.h
@@ -119,6 +119,8 @@ public:
 #define BT_TRIANLGE_INFO_MAP	MAKE_ID('T','M','A','P')
 #define BT_SHAPE_CODE			MAKE_ID('S','H','A','P')
 #define BT_ARRAY_CODE			MAKE_ID('A','R','A','Y')
+#define BT_DNA_CODE				MAKE_ID('D','N','A','1')
+
 
 
 struct	btPointerUid
@@ -176,9 +178,9 @@ protected:
 
 		void	writeDNA()
 		{
-			unsigned char* dnaTarget = m_buffer+m_currentSize;
-			memcpy(dnaTarget,m_dna,m_dnaLength);
-			m_currentSize += m_dnaLength;
+			btChunk* dnaChunk = allocate(m_dnaLength,1);
+			memcpy(dnaChunk->m_oldPtr,m_dna,m_dnaLength);
+			finalizeChunk(dnaChunk,"DNA1",BT_DNA_CODE, m_dna);
 		}
 
 		int getReverseType(const char *type) const
@@ -451,7 +453,7 @@ public:
 
 			m_buffer[9] = '2';
 			m_buffer[10] = '7';
-			m_buffer[11] = '6';
+			m_buffer[11] = '7';
 
 			
 		}