diff --git a/drivers/network/ndis/ndis/misc.c b/drivers/network/ndis/ndis/misc.c
index 71e64c12cde..018f2ae5c72 100644
--- a/drivers/network/ndis/ndis/misc.c
+++ b/drivers/network/ndis/ndis/misc.c
@@ -210,6 +210,8 @@ NdisCloseFile(
 
   ZwClose ( FileHandleObject->FileHandle );
 
+  ExFreePool(FileHandleObject->MapBuffer);
+
   memset ( FileHandleObject, 0, sizeof(NDIS_HANDLE_OBJECT) );
 
   ExFreePool ( FileHandleObject );
@@ -311,8 +313,20 @@ cleanup:
     *FileHandle = NULL;
   }
   else
-    *FileHandle = NDIS_POBJECT_TO_HANDLE(FileHandleObject);
-
+    {
+        FILE_STANDARD_INFORMATION fileInfo = {0};
+        *Status = ZwQueryInformationFile(
+            FileHandleObject->FileHandle, &IoStatusBlock, &fileInfo, sizeof(fileInfo), FileStandardInformation);
+        if (NT_SUCCESS(ntstatus))
+        {
+            FileHandleObject->MapBuffer = ExAllocatePool(NonPagedPool, *FileLength);
+            ZwReadFile(
+                FileHandleObject->FileHandle, NULL, NULL, NULL, &IoStatusBlock, FileHandleObject->MapBuffer,
+                (ULONG)*FileLength, NULL, NULL);
+            *FileLength = fileInfo.EndOfFile.LowPart;
+            *FileHandle = NDIS_POBJECT_TO_HANDLE(FileHandleObject);
+        }
+    }
   return;
 }