diff --git a/src/visualizer/model/pyviz.cc b/src/visualizer/model/pyviz.cc
index bbe4877d8..4238786ba 100644
--- a/src/visualizer/model/pyviz.cc
+++ b/src/visualizer/model/pyviz.cc
@@ -85,6 +85,7 @@ PyVizPacketTag::GetTypeId (void)
 {
   static TypeId tid = TypeId ("ns3::PyVizPacketTag")
     .SetParent<Tag> ()
+    .SetGroupName ("Visualizer")
     .AddConstructor<PyVizPacketTag> ()
   ;
   return tid;
diff --git a/src/visualizer/model/visual-simulator-impl.cc b/src/visualizer/model/visual-simulator-impl.cc
index c88e2fd7d..ba5af08b2 100644
--- a/src/visualizer/model/visual-simulator-impl.cc
+++ b/src/visualizer/model/visual-simulator-impl.cc
@@ -45,6 +45,7 @@ VisualSimulatorImpl::GetTypeId (void)
 {
   static TypeId tid = TypeId ("ns3::VisualSimulatorImpl")
     .SetParent<SimulatorImpl> ()
+    .SetGroupName ("Visualizer")
     .AddConstructor<VisualSimulatorImpl> ()
     .AddAttribute ("SimulatorImplFactory",
                    "Factory for the underlying simulator implementation used by the visualizer.",