diff --git a/reactos/drivers/filesystems/fastfat/create.c b/reactos/drivers/filesystems/fastfat/create.c
index 3a2f5be23ba..d32eac3390e 100644
--- a/reactos/drivers/filesystems/fastfat/create.c
+++ b/reactos/drivers/filesystems/fastfat/create.c
@@ -453,7 +453,7 @@ VfatCreateFile ( PDEVICE_OBJECT DeviceObject, PIRP Irp )
 	if (FileObject->FileName.Length == 0 &&
 		(FileObject->RelatedFileObject == NULL || FileObject->RelatedFileObject->FsContext2 != NULL))
 	{
-		if (RequestedDisposition != FILE_OPEN ||
+		if (RequestedDisposition != FILE_OPEN &&
 			RequestedDisposition != FILE_OPEN_IF)
 		{
 			return(STATUS_ACCESS_DENIED);
diff --git a/reactos/drivers/filesystems/fastfat/fsctl.c b/reactos/drivers/filesystems/fastfat/fsctl.c
index 6760ebfcbd9..0c1d0bcaee5 100644
--- a/reactos/drivers/filesystems/fastfat/fsctl.c
+++ b/reactos/drivers/filesystems/fastfat/fsctl.c
@@ -85,8 +85,8 @@ VfatHasFileSystem(PDEVICE_OBJECT DeviceToMount,
       }
       PartitionInfoIsValid = TRUE;
       DPRINT("Partition Information:\n");
-      DPRINT("StartingOffset      %u\n", PartitionInfo.StartingOffset.QuadPart  / 512);
-      DPRINT("PartitionLength     %u\n", PartitionInfo.PartitionLength.QuadPart / 512);
+      DPRINT("StartingOffset      %I64u\n", PartitionInfo.StartingOffset.QuadPart  / 512);
+      DPRINT("PartitionLength     %I64u\n", PartitionInfo.PartitionLength.QuadPart / 512);
       DPRINT("HiddenSectors       %u\n", PartitionInfo.HiddenSectors);
       DPRINT("PartitionNumber     %u\n", PartitionInfo.PartitionNumber);
       DPRINT("PartitionType       %u\n", PartitionInfo.PartitionType);
diff --git a/reactos/drivers/filesystems/fastfat/rw.c b/reactos/drivers/filesystems/fastfat/rw.c
index 57edf7ef6bd..ab161833b33 100644
--- a/reactos/drivers/filesystems/fastfat/rw.c
+++ b/reactos/drivers/filesystems/fastfat/rw.c
@@ -355,7 +355,7 @@ VfatWriteFileData(PVFAT_IRP_CONTEXT IrpContext,
 
    DPRINT("VfatWriteFileData(DeviceExt %p, FileObject %p, "
 	  "Length %d, WriteOffset 0x%I64x), '%wZ'\n", DeviceExt,
-	  IrpContext->FileObject, Length, WriteOffset,
+	  IrpContext->FileObject, Length, WriteOffset.QuadPart,
 	  &Fcb->PathNameU);
 
    ASSERT(WriteOffset.QuadPart + Length <= Fcb->RFCB.AllocationSize.QuadPart);