diff --git a/src/inet/linklayer/ieee8021as/Gptp.ned b/src/inet/linklayer/ieee8021as/Gptp.ned
index 158ea411ae0..2cad10389e8 100644
--- a/src/inet/linklayer/ieee8021as/Gptp.ned
+++ b/src/inet/linklayer/ieee8021as/Gptp.ned
@@ -7,8 +7,6 @@
 
 package inet.linklayer.ieee8021as;
 
-import inet.applications.contract.IApp;
-
 //
 // This module implements the IEEE 802.1as protocol also known as gPTP. It
 // measures link delays to neighboring gPTP network nodes periodically. The
@@ -16,7 +14,7 @@ import inet.applications.contract.IApp;
 // and their roles in the time synchronization domain. The time synchronization
 // is done periodically and the clock module is set.
 //
-simple Gptp like IApp
+simple Gptp like IGptp
 {
     parameters:
         string clockModule = default(""); // relative path of a module that implements IClock; optional
diff --git a/src/inet/linklayer/ieee8021as/IGptp.ned b/src/inet/linklayer/ieee8021as/IGptp.ned
new file mode 100644
index 00000000000..2c485c8e2de
--- /dev/null
+++ b/src/inet/linklayer/ieee8021as/IGptp.ned
@@ -0,0 +1,20 @@
+//
+// Copyright (C) 2010 Helene Lageber
+//
+// SPDX-License-Identifier: LGPL-3.0-or-later
+//
+
+package inet.linklayer.ieee8021as;
+
+import inet.applications.contract.IApp;
+
+//
+// Interface for gPTP module.
+//
+moduleinterface IGptp extends IApp
+{
+    parameters:
+        string gptpNodeType;
+        @display("i=block/app");
+}
+
diff --git a/src/inet/linklayer/ieee8021as/MultiDomainGptp.ned b/src/inet/linklayer/ieee8021as/MultiDomainGptp.ned
index 3bde3660870..620af3f910e 100644
--- a/src/inet/linklayer/ieee8021as/MultiDomainGptp.ned
+++ b/src/inet/linklayer/ieee8021as/MultiDomainGptp.ned
@@ -7,7 +7,6 @@
 
 package inet.linklayer.ieee8021as;
 
-import inet.applications.contract.IApp;
 import inet.queueing.classifier.PacketClassifier;
 import inet.queueing.common.PacketMultiplexer;
 
@@ -19,7 +18,7 @@ import inet.queueing.common.PacketMultiplexer;
 //
 // @see ~MultiClock
 //
-module MultiDomainGptp like IApp
+module MultiDomainGptp like IGptp
 {
     parameters:
         string clockModule; // relative module path of the multi clock
@@ -31,7 +30,7 @@ module MultiDomainGptp like IApp
         input socketIn;
         output socketOut;
     submodules:
-        domain[numDomains]: <default("Gptp")> like IApp {
+        domain[numDomains]: <default("Gptp")> like IGptp {
             gptpNodeType = default(parent.gptpNodeType);
             clockModule = default(absPath(parent.clockModule) + ".clock[" + string(this.index) + "]");
             interfaceTableModule = default(absPath(parent.interfaceTableModule));