diff --git a/reactos/drivers/filters/mountmgr/device.c b/reactos/drivers/filters/mountmgr/device.c
index 609849d1c85..a84a16abe57 100644
--- a/reactos/drivers/filters/mountmgr/device.c
+++ b/reactos/drivers/filters/mountmgr/device.c
@@ -1161,6 +1161,9 @@ MountMgrValidateBackPointer(IN PASSOCIATED_DEVICE_ENTRY AssociatedDeviceEntry,
     return STATUS_SUCCESS;
 }
 
+/*
+ * @implemented
+ */
 NTSTATUS
 MountMgrQueryVolumePaths(IN PDEVICE_EXTENSION DeviceExtension,
                          IN PDEVICE_INFORMATION DeviceInformation,
@@ -1448,6 +1451,9 @@ MountMgrQueryVolumePaths(IN PDEVICE_EXTENSION DeviceExtension,
     return STATUS_SUCCESS;
 }
 
+/*
+ * @implemented
+ */
 NTSTATUS
 MountMgrQueryDosVolumePaths(IN PDEVICE_EXTENSION DeviceExtension,
                             IN PIRP Irp)
diff --git a/reactos/drivers/filters/mountmgr/mntmgr.h b/reactos/drivers/filters/mountmgr/mntmgr.h
index 7161c4b0fe5..a7f496cc84a 100644
--- a/reactos/drivers/filters/mountmgr/mntmgr.h
+++ b/reactos/drivers/filters/mountmgr/mntmgr.h
@@ -4,6 +4,7 @@
 #include <ntifs.h>
 #include <mountdev.h>
 #include <ntddvol.h>
+#include <ntdddisk.h>
 #include <wdmguid.h>
 #include <ndk/psfuncs.h>
 #include <ntdddisk.h>
@@ -23,8 +24,6 @@
 
 #define FILE_READ_PROPERTIES  0x00000008
 #define FILE_WRITE_PROPERTIES 0x00000010
-
-#define GPT_BASIC_DATA_ATTRIBUTE_NO_DRIVE_LETTER 0x80000000
 /* Leave FIXME */
 
 typedef struct _DEVICE_EXTENSION