diff --git a/Minecraft.World/IO/Files/FileHeader.cpp b/Minecraft.World/IO/Files/FileHeader.cpp
index fd9e16e26..547e0aaa6 100644
--- a/Minecraft.World/IO/Files/FileHeader.cpp
+++ b/Minecraft.World/IO/Files/FileHeader.cpp
@@ -325,7 +325,7 @@ unsigned int FileHeader::GetFileSize()
 	return GetStartOfNextData() + ( sizeof(FileEntrySaveData) * (unsigned int)fileTable.size() );
 }
 
-void FileHeader::AdjustStartOffsets(FileEntry *file, DWORD nNumberOfBytesToWrite, bool subtract /*= false*/)
+void FileHeader::AdjustStartOffsets(FileEntry *file, unsigned int nNumberOfBytesToWrite, bool subtract /*= false*/)
 {
 	bool found = false;
 	for( unsigned int i = 0; i < fileTable.size(); ++i )
diff --git a/Minecraft.World/IO/Files/FileHeader.h b/Minecraft.World/IO/Files/FileHeader.h
index 5367a2924..155efaa1c 100644
--- a/Minecraft.World/IO/Files/FileHeader.h
+++ b/Minecraft.World/IO/Files/FileHeader.h
@@ -173,7 +173,7 @@ protected:
 
 	unsigned int GetFileSize();
 
-	void AdjustStartOffsets(FileEntry *file, DWORD nNumberOfBytesToWrite, bool subtract = false);
+	void AdjustStartOffsets(FileEntry *file, unsigned int nNumberOfBytesToWrite, bool subtract = false);
 
 	bool fileExists( const std::wstring &name );