diff --git a/modules/libnetconf2-netconf-server.yang b/modules/libnetconf2-netconf-server.yang
index 9d8bbb9..e38232d 100644
--- a/modules/libnetconf2-netconf-server.yang
+++ b/modules/libnetconf2-netconf-server.yang
@@ -7,6 +7,10 @@
     prefix ncs;
   }
 
+  import ietf-crypto-types {
+    prefix ct;
+  }
+
   augment "/ncs:netconf-server/ncs:listen/ncs:endpoint/ncs:transport/ncs:ssh/ncs:ssh/ncs:ssh-server-parameters/ncs:client-authentication" {
     leaf auth-attempts {
       type uint16;
@@ -52,4 +56,8 @@
       }
     }
   }
+
+  identity ed25519-private-key-format {
+    base ct:private-key-format;
+  }
 }