diff --git a/Rules-for-adding-new-device-types.md b/Rules-for-adding-new-device-types.md
index a9dd4c7..1637aaf 100644
--- a/Rules-for-adding-new-device-types.md
+++ b/Rules-for-adding-new-device-types.md
@@ -5,6 +5,7 @@ Steps for adding a new device type:
 1. Add the device type to the PbDeviceType enum of the protobuf definition.
 2. Add code for creating the device type to the DeviceFactory class. The device instance and all devices-specific properties have to be created by this class.
 3. Add the device-type specific implementation in new .cpp/.h files.
-4. Update the manpages.
+4. Ensure to initialize the device type with its device type properties.
+5. Update the manpages.
 
 Devices should only inherit from the Disk class if they make use of image files. Only devices backed by image files can be disks.
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