diff --git a/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/dosfiles.c b/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/dosfiles.c
index 1dda966210a..fea885a71b8 100644
--- a/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/dosfiles.c
+++ b/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/dosfiles.c
@@ -844,6 +844,8 @@ WORD DosReadFile(WORD FileHandle,
             PCHAR Pointer = FAR_POINTER(Buffer);
             CHAR Character;
 
+            *BytesRead = 0;
+
             while (*BytesRead < Count)
             {
                 USHORT Amount = 1;