diff --git a/src/plugins/qmlprofiler/qmlprofilerruncontrol.cpp b/src/plugins/qmlprofiler/qmlprofilerruncontrol.cpp
index dbd056aad95..55a47e3f59d 100644
--- a/src/plugins/qmlprofiler/qmlprofilerruncontrol.cpp
+++ b/src/plugins/qmlprofiler/qmlprofilerruncontrol.cpp
@@ -251,8 +251,10 @@ void QmlProfilerRunControl::processIsRunning(Utils::Port port)
 {
     d->m_noDebugOutputTimer.stop();
 
-    if (!port.isValid())
+    if (!port.isValid()) {
+        QTC_ASSERT(connection().is<AnalyzerConnection>(), return);
         port = connection().as<AnalyzerConnection>().analyzerPort;
+    }
     if (port.isValid())
         emit processRunning(port);
 }
diff --git a/src/plugins/qmlprofiler/qmlprofilertool.cpp b/src/plugins/qmlprofiler/qmlprofilertool.cpp
index 8ba2e59b3cb..cb74dcb8e14 100644
--- a/src/plugins/qmlprofiler/qmlprofilertool.cpp
+++ b/src/plugins/qmlprofiler/qmlprofilertool.cpp
@@ -349,6 +349,7 @@ void QmlProfilerTool::finalizeRunControl(QmlProfilerRunControl *runControl)
 {
     runControl->registerProfilerStateManager(d->m_profilerState);
 
+    QTC_ASSERT(runControl->connection().is<AnalyzerConnection>(), return);
     // FIXME: Check that there's something sensible in sp.connParams
     auto connection = runControl->connection().as<AnalyzerConnection>();
     if (!connection.analyzerSocket.isEmpty())