diff --git a/bundles/org.openhab.core.karaf/src/main/java/org/openhab/core/karaf/internal/KarafExtensionService.java b/bundles/org.openhab.core.karaf/src/main/java/org/openhab/core/karaf/internal/KarafExtensionService.java
index 1003659bbe5cb..f720a701d5a24 100644
--- a/bundles/org.openhab.core.karaf/src/main/java/org/openhab/core/karaf/internal/KarafExtensionService.java
+++ b/bundles/org.openhab.core.karaf/src/main/java/org/openhab/core/karaf/internal/KarafExtensionService.java
@@ -8,6 +8,7 @@
  */
 package org.openhab.core.karaf.internal;
 
+import java.net.URI;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -141,6 +142,11 @@ public void uninstall(String id) {
         featureInstaller.removeAddon(getType(id), getName(id));
     }
 
+    @Override
+    public String getExtensionId(URI extensionURI) {
+        return null;
+    }
+
     private String getType(String name) {
         if (name.startsWith(FeatureInstaller.PREFIX)) {
             name = name.substring(FeatureInstaller.PREFIX.length());