diff --git a/bc/os/File.cpp b/bc/os/File.cpp
index 655c6a2..428ff37 100644
--- a/bc/os/File.cpp
+++ b/bc/os/File.cpp
@@ -110,7 +110,7 @@ int32_t OsReadFile(HOSFILE fileHandle, void* buffer, size_t bytesToRead, size_t*
     return Blizzard::File::Read(fileHandle, buffer, bytesToRead, bytesRead);
 }
 
-int32_t OsWriteFile(HOSFILE fileHandle, void* buffer, size_t bytesToWrite, size_t* bytesWritten) {
+int32_t OsWriteFile(HOSFILE fileHandle, void* buffer, size_t bytesToWrite, size_t bytesWritten) {
     if (buffer != nullptr && bytesToWrite != 0) {
         return Blizzard::File::Write(fileHandle, buffer, bytesToWrite, bytesWritten);
     }
@@ -118,9 +118,8 @@ int32_t OsWriteFile(HOSFILE fileHandle, void* buffer, size_t bytesToWrite, size_
     return 0;
 }
 
-
 int64_t OsSetFilePointer(HOSFILE fileHandle, int64_t distanceToMove, uint32_t moveMethod) {
-    BLIZZARD_ASSERT(moveMethod <= BC_FILE_SEEK_END);
+    BLIZZARD_ASSERT(moveMethod <= 2);
 
     int64_t position;
 
diff --git a/bc/os/File.hpp b/bc/os/File.hpp
index 150a357..325b1c8 100644
--- a/bc/os/File.hpp
+++ b/bc/os/File.hpp
@@ -56,7 +56,9 @@ int32_t  OsSetFileAttributes(const char* fileName, uint32_t attributes);
 
 uint64_t OsGetFileSize(HOSFILE fileHandle);
 
-int32_t  OsReadFile(HOSFILE fileHandle, void* buffer, uint32_t bytesToRead, uint32_t* bytesRead);
+uint64_t OsWriteFile(HOSFILE fileHandle, void* buffer, size_t bytesToWrite, size_t bytesWritten);
+
+int32_t  OsReadFile(HOSFILE fileHandle, void* buffer, size_t bytesToRead, size_t* bytesRead);
 
 void     OsCloseFile(HOSFILE fileHandle);