diff --git a/cpp/src/IceStorm/Instrumentation.h b/cpp/src/IceStorm/Instrumentation.h
index 718c447dc91..bf084e4b188 100644
--- a/cpp/src/IceStorm/Instrumentation.h
+++ b/cpp/src/IceStorm/Instrumentation.h
@@ -99,14 +99,11 @@ namespace IceStorm::Instrumentation
 
         /**
          * This method should return an observer for the given topic.
-         * @param svc The service name.
          * @param name The topic name.
          * @param old The previous observer, only set when updating an existing observer.
          */
-        virtual std::shared_ptr<TopicObserver> getTopicObserver(
-            const std::string& svc,
-            const std::string& name,
-            const std::shared_ptr<TopicObserver>& old) = 0;
+        virtual std::shared_ptr<TopicObserver>
+        getTopicObserver(const std::string& name, const std::shared_ptr<TopicObserver>& old) = 0;
 
         /**
          * This method should return an observer for the given subscriber.
@@ -115,7 +112,6 @@ namespace IceStorm::Instrumentation
          * @param old The previous observer, only set when updating an existing observer.
          */
         virtual std::shared_ptr<SubscriberObserver> getSubscriberObserver(
-            const std::string& svc,
             const std::string& topic,
             const Ice::ObjectPrx& prx,
             const QoS& q,
diff --git a/cpp/src/IceStorm/InstrumentationI.cpp b/cpp/src/IceStorm/InstrumentationI.cpp
index b6a71c9eb93..9f334409b6b 100644
--- a/cpp/src/IceStorm/InstrumentationI.cpp
+++ b/cpp/src/IceStorm/InstrumentationI.cpp
@@ -24,24 +24,19 @@ namespace
         public:
             Attributes()
             {
-                add("parent", &TopicHelper::getService);
                 add("id", &TopicHelper::getId);
                 add("topic", &TopicHelper::getId);
-                add("service", &TopicHelper::getService);
             }
         };
         static Attributes attributes;
 
-        TopicHelper(const string& service, const string& name) : _service(service), _name(name) {}
+        TopicHelper(const string& name) : _name(name) {}
 
         virtual string operator()(const string& attribute) const { return attributes(this, attribute); }
 
-        const string& getService() const { return _service; }
-
         const string& getId() const { return _name; }
 
     private:
-        const string& _service;
         const string& _name;
     };
 
@@ -58,7 +53,6 @@ namespace
                 add("parent", &SubscriberHelper::getTopic);
                 add("id", &SubscriberHelper::getId);
                 add("topic", &SubscriberHelper::getTopic);
-                add("service", &SubscriberHelper::getService);
 
                 add("identity", &SubscriberHelper::getIdentity);
 
@@ -75,14 +69,12 @@ namespace
         static Attributes attributes;
 
         SubscriberHelper(
-            const string& svc,
             const string& topic,
             const Ice::ObjectPrx& proxy,
             const IceStorm::QoS& qos,
             optional<IceStorm::TopicPrx> link,
             SubscriberState state)
-            : _service(svc),
-              _topic(topic),
+            : _topic(topic),
               _proxy(proxy),
               _qos(qos),
               _link(std::move(link)),
@@ -109,8 +101,6 @@ namespace
             throw invalid_argument(attribute);
         }
 
-        const string& getService() const { return _service; }
-
         const string& getTopic() const { return _topic; }
 
         string getMode() const
@@ -181,7 +171,6 @@ namespace
         }
 
     private:
-        const string& _service;
         const string& _topic;
         const Ice::ObjectPrx& _proxy;
         const IceStorm::QoS& _qos;
@@ -287,16 +276,13 @@ TopicManagerObserverI::setObserverUpdater(const shared_ptr<ObserverUpdater>& upd
 }
 
 shared_ptr<TopicObserver>
-TopicManagerObserverI::getTopicObserver(
-    const string& service, // TODO: should always be "IceStorm"
-    const string& topic,
-    const shared_ptr<TopicObserver>& old)
+TopicManagerObserverI::getTopicObserver(const string& topic, const shared_ptr<TopicObserver>& old)
 {
     if (_topics.isEnabled())
     {
         try
         {
-            return _topics.getObserver(TopicHelper(service, topic), old);
+            return _topics.getObserver(TopicHelper(topic), old);
         }
         catch (const exception& ex)
         {
@@ -309,7 +295,6 @@ TopicManagerObserverI::getTopicObserver(
 
 shared_ptr<SubscriberObserver>
 TopicManagerObserverI::getSubscriberObserver(
-    const string& svc,
     const string& topic,
     const Ice::ObjectPrx& proxy,
     const IceStorm::QoS& qos,
@@ -321,7 +306,7 @@ TopicManagerObserverI::getSubscriberObserver(
     {
         try
         {
-            return _subscribers.getObserver(SubscriberHelper(svc, topic, proxy, qos, link, state), old);
+            return _subscribers.getObserver(SubscriberHelper(topic, proxy, qos, link, state), old);
         }
         catch (const exception& ex)
         {
diff --git a/cpp/src/IceStorm/InstrumentationI.h b/cpp/src/IceStorm/InstrumentationI.h
index 3e4f55ea6c2..ed908d04d16 100644
--- a/cpp/src/IceStorm/InstrumentationI.h
+++ b/cpp/src/IceStorm/InstrumentationI.h
@@ -35,13 +35,10 @@ namespace IceStorm
 
         void setObserverUpdater(const std::shared_ptr<IceStorm::Instrumentation::ObserverUpdater>&) override;
 
-        std::shared_ptr<IceStorm::Instrumentation::TopicObserver> getTopicObserver(
-            const std::string&,
-            const std::string&,
-            const std::shared_ptr<IceStorm::Instrumentation::TopicObserver>&) override;
+        std::shared_ptr<IceStorm::Instrumentation::TopicObserver>
+        getTopicObserver(const std::string&, const std::shared_ptr<IceStorm::Instrumentation::TopicObserver>&) override;
 
         std::shared_ptr<IceStorm::Instrumentation::SubscriberObserver> getSubscriberObserver(
-            const std::string&,
             const std::string&,
             const Ice::ObjectPrx&,
             const IceStorm::QoS&,
diff --git a/cpp/src/IceStorm/Subscriber.cpp b/cpp/src/IceStorm/Subscriber.cpp
index a3f0426ebab..b215a0d9e45 100644
--- a/cpp/src/IceStorm/Subscriber.cpp
+++ b/cpp/src/IceStorm/Subscriber.cpp
@@ -814,7 +814,6 @@ Subscriber::updateObserver()
     {
         assert(_rec.obj);
         _observer.attach(_instance->observer()->getSubscriberObserver(
-            "IceStorm",
             _rec.topicName,
             *_rec.obj,
             _rec.theQoS,
@@ -852,7 +851,6 @@ Subscriber::Subscriber(
     {
         assert(_rec.obj);
         _observer.attach(_instance->observer()->getSubscriberObserver(
-            "IceStorm",
             _rec.topicName,
             *_rec.obj,
             _rec.theQoS,
@@ -900,7 +898,6 @@ Subscriber::setState(Subscriber::SubscriberState state)
         {
             assert(_rec.obj);
             _observer.attach(_instance->observer()->getSubscriberObserver(
-                "IceStorm",
                 _rec.topicName,
                 *_rec.obj,
                 _rec.theQoS,
diff --git a/cpp/src/IceStorm/TopicI.cpp b/cpp/src/IceStorm/TopicI.cpp
index 7904effa854..ef4b91ff224 100644
--- a/cpp/src/IceStorm/TopicI.cpp
+++ b/cpp/src/IceStorm/TopicI.cpp
@@ -428,7 +428,7 @@ TopicImpl::TopicImpl(
 
         if (_instance->observer())
         {
-            _observer.attach(_instance->observer()->getTopicObserver("IceStorm", _name, nullptr));
+            _observer.attach(_instance->observer()->getTopicObserver(_name, nullptr));
         }
     }
     catch (const std::exception&)
@@ -1140,7 +1140,7 @@ TopicImpl::updateObserver()
 
     if (_instance->observer())
     {
-        _observer.attach(_instance->observer()->getTopicObserver("IceStorm", _name, _observer.get()));
+        _observer.attach(_instance->observer()->getTopicObserver(_name, _observer.get()));
     }
 }