diff --git a/pcbnew/widgets/pcb_net_inspector_panel.cpp b/pcbnew/widgets/pcb_net_inspector_panel.cpp
index 61e91efb16..fc2a8309e6 100644
--- a/pcbnew/widgets/pcb_net_inspector_panel.cpp
+++ b/pcbnew/widgets/pcb_net_inspector_panel.cpp
@@ -399,6 +399,8 @@ void PCB_NET_INSPECTOR_PANEL::buildNetsList( bool rebuildColumns )
 
     m_in_build_nets_list = true;
 
+    m_netsList->Freeze();
+
     PROJECT_LOCAL_SETTINGS& localSettings = Pgm().GetSettingsManager().Prj().GetLocalSettings();
     PANEL_NET_INSPECTOR_SETTINGS* cfg = &localSettings.m_NetInspectorPanel;
 
@@ -583,6 +585,8 @@ void PCB_NET_INSPECTOR_PANEL::buildNetsList( bool rebuildColumns )
 
     alg::delete_matching( prev_selected_netcodes, -1 );
 
+    m_netsList->Thaw();
+
     m_in_build_nets_list = false;
 }