diff --git a/channels/drive/client/drive_file.c b/channels/drive/client/drive_file.c
index 48e0a1794..9423c522e 100644
--- a/channels/drive/client/drive_file.c
+++ b/channels/drive/client/drive_file.c
@@ -482,9 +482,11 @@ BOOL drive_file_set_information(DRIVE_FILE* file, UINT32 FsInformationClass, UIN
 			/* http://msdn.microsoft.com/en-us/library/cc232067.aspx */
 		case FileAllocationInformation:
 			/* http://msdn.microsoft.com/en-us/library/cc232076.aspx */
+#ifndef _WIN32
 			Stream_Read_UINT64(input, size);
 			if (ftruncate(file->fd, size) != 0)
 				return FALSE;
+#endif
 			break;
 
 		case FileDispositionInformation:
diff --git a/channels/drive/client/drive_file.h b/channels/drive/client/drive_file.h
index 769a18def..28ac5780a 100644
--- a/channels/drive/client/drive_file.h
+++ b/channels/drive/client/drive_file.h
@@ -40,13 +40,13 @@
 #endif
 
 #ifdef _WIN32
-#define STAT stat
+#define STAT __stat64
 #define OPEN _open
 #define close _close
 #define read  _read
 #define write _write
-#define LSEEK _lseek
-#define FSTAT fstat
+#define LSEEK _lseeki64
+#define FSTAT _fstat64
 #define STATVFS statvfs
 #define mkdir(a,b) _mkdir(a)
 #define rmdir _rmdir