diff --git a/drivers/filesystems/fastfat/cleanup.c b/drivers/filesystems/fastfat/cleanup.c
index 85b4ea2d2cb..d584dee8595 100644
--- a/drivers/filesystems/fastfat/cleanup.c
+++ b/drivers/filesystems/fastfat/cleanup.c
@@ -41,6 +41,7 @@ VfatCleanupFile(
     if (IsVolume)
     {
         pFcb->OpenHandleCount--;
+        DeviceExt->OpenHandleCount--;
 
         if (pFcb->OpenHandleCount != 0)
         {