diff --git a/pcsx2/AsyncFileReader.h b/pcsx2/AsyncFileReader.h
index 22a09f5bb2..1594b39eb0 100644
--- a/pcsx2/AsyncFileReader.h
+++ b/pcsx2/AsyncFileReader.h
@@ -31,8 +31,9 @@ public:
 
 	virtual uint GetBlockCount(void) const=0;
 	
-	virtual void SetBlockSize(uint bytes) {}	
-	
+	virtual void SetBlockSize(uint bytes) {}
+	virtual void SetDataOffset(uint bytes) {}
+
 	uint GetBlockSize() const { return m_blocksize; }
 
 	const wxString& GetFilename() const
@@ -73,8 +74,9 @@ public:
 	virtual void Close(void);
 
 	virtual uint GetBlockCount(void) const;
-	
-	void SetBlockSize(uint bytes) { m_blocksize = bytes; }
+
+	virtual void SetBlockSize(uint bytes) { m_blocksize = bytes; }
+	virtual void SetDataOffset(uint bytes) { m_dataoffset = bytes; }
 };
 
 class MultipartFileReader : public AsyncFileReader
@@ -110,7 +112,7 @@ public:
 
 	virtual uint GetBlockCount(void) const;
 	
-	void SetBlockSize(uint bytes);
+	virtual void SetBlockSize(uint bytes);
 
 	static AsyncFileReader* DetectMultipart(AsyncFileReader* reader);
 };
diff --git a/pcsx2/CDVD/InputIsoFile.cpp b/pcsx2/CDVD/InputIsoFile.cpp
index 4fccad37e8..126bbcb0e7 100644
--- a/pcsx2/CDVD/InputIsoFile.cpp
+++ b/pcsx2/CDVD/InputIsoFile.cpp
@@ -234,7 +234,8 @@ bool InputIsoFile::Open( const wxString& srcfile, bool testOnly )
 	if(!isBlockdump)
 	{
 		ReadUnit = MaxReadUnit;
-
+		
+		m_reader->SetDataOffset(m_offset);
 		m_reader->SetBlockSize(m_blocksize);
 	
 		// Returns the original reader if single-part or a Multipart reader otherwise
@@ -277,7 +278,8 @@ bool InputIsoFile::tryIsoType(u32 _size, s32 _offset, s32 _blockofs)
 	m_blocksize	= _size;
 	m_offset	= _offset;
 	m_blockofs	= _blockofs;
-
+	
+	m_reader->SetDataOffset(_offset);
 	m_reader->SetBlockSize(_size);
 	
 	if(ReadSync(buf, 16) < 0)
@@ -331,6 +333,7 @@ bool InputIsoFile::Detect( bool readType )
 	m_blockofs	= 0;
 	m_type		= ISOTYPE_AUDIO;
 	
+	m_reader->SetDataOffset(m_offset);
 	m_reader->SetBlockSize(m_blocksize);
 
 	//BUG: This also detects a memory-card-file as a valid Audio-CD ISO... -avih
diff --git a/pcsx2/Linux/LnxFlatFileReader.cpp b/pcsx2/Linux/LnxFlatFileReader.cpp
index 798ca567d4..5c9d5f6c64 100644
--- a/pcsx2/Linux/LnxFlatFileReader.cpp
+++ b/pcsx2/Linux/LnxFlatFileReader.cpp
@@ -34,7 +34,7 @@ int FlatFileReader::ReadSync(void* pBuffer, uint sector, uint count)
 void FlatFileReader::BeginRead(void* pBuffer, uint sector, uint count)
 {
 	u64 offset;
-	offset = sector * (u64)m_blocksize;
+	offset = sector * (u64)m_blocksize + m_dataoffset;
 
 	u32 bytesToRead = count * m_blocksize;
 
diff --git a/pcsx2/windows/FlatFileReaderWindows.cpp b/pcsx2/windows/FlatFileReaderWindows.cpp
index 8e0c908c1b..f590923987 100644
--- a/pcsx2/windows/FlatFileReaderWindows.cpp
+++ b/pcsx2/windows/FlatFileReaderWindows.cpp
@@ -51,7 +51,7 @@ int FlatFileReader::ReadSync(void* pBuffer, uint sector, uint count)
 void FlatFileReader::BeginRead(void* pBuffer, uint sector, uint count)
 {
 	LARGE_INTEGER offset;
-	offset.QuadPart = sector * (__int64)m_blocksize;
+	offset.QuadPart = sector * (s64)m_blocksize + m_dataoffset;
 	
 	DWORD bytesToRead = count * m_blocksize;