diff --git a/drivers/filesystems/fastfat/vfat.h b/drivers/filesystems/fastfat/vfat.h
index 48923cdc945..478753447d0 100644
--- a/drivers/filesystems/fastfat/vfat.h
+++ b/drivers/filesystems/fastfat/vfat.h
@@ -1148,14 +1148,14 @@ VfatBuildRequest(
 
 PVOID
 VfatGetUserBuffer(
-    IN PIRP,
+    IN PIRP Irp,
     IN BOOLEAN Paging);
 
 NTSTATUS
 VfatLockUserBuffer(
-    IN PIRP,
-    IN ULONG,
-    IN LOCK_OPERATION);
+    IN PIRP Irp,
+    IN ULONG Length,
+    IN LOCK_OPERATION Operation);
 
 BOOLEAN
 VfatCheckForDismount(
@@ -1221,11 +1221,6 @@ BOOLEAN
 vfatIsLongIllegal(
     WCHAR c);
 
-BOOLEAN
-wstrcmpjoki(
-    PWSTR s1,
-    PWSTR s2);
-
 /* volume.c */
 
 NTSTATUS