diff --git a/webconsole-plugins/upnp/src/main/java/org/apache/felix/webconsole/plugins/upnp/internal/Activator.java b/webconsole-plugins/upnp/src/main/java/org/apache/felix/webconsole/plugins/upnp/internal/Activator.java
index f4ceae8..65b5d4d 100644
--- a/webconsole-plugins/upnp/src/main/java/org/apache/felix/webconsole/plugins/upnp/internal/Activator.java
+++ b/webconsole-plugins/upnp/src/main/java/org/apache/felix/webconsole/plugins/upnp/internal/Activator.java
@@ -106,7 +106,7 @@
                 controller.removedService(reference, service);
         }
 
-        if (tracker.size() <= 1 && plugin != null)
+        if (tracker.size() == 0 && plugin != null)
         {
             plugin.unregister();
             this.plugin = null;