diff --git a/headers/private/kernel/disk_device_manager/KDiskDeviceUtils.h b/headers/private/kernel/disk_device_manager/KDiskDeviceUtils.h
index e634efb813..3ba9362185 100644
--- a/headers/private/kernel/disk_device_manager/KDiskDeviceUtils.h
+++ b/headers/private/kernel/disk_device_manager/KDiskDeviceUtils.h
@@ -186,5 +186,6 @@ using BPrivate::DiskDevice::AutoLocker;
 using BPrivate::DiskDevice::DeviceReadLocker;
 using BPrivate::DiskDevice::DeviceWriteLocker;
 using BPrivate::DiskDevice::ManagerLocker;
+using BPrivate::DiskDevice::PartitionRegistrar;
 
 #endif	// _K_DISK_DEVICE_H