diff --git a/eeschema/sim/sim_plot_frame.cpp b/eeschema/sim/sim_plot_frame.cpp
index 976481029f..2ea8dbaa09 100644
--- a/eeschema/sim/sim_plot_frame.cpp
+++ b/eeschema/sim/sim_plot_frame.cpp
@@ -1216,7 +1216,13 @@ void SIM_PLOT_FRAME::menuWhiteBackground( wxCommandEvent& event )
         if( curPage == m_welcomePanel )
             continue;
 
-        static_cast<SIM_PLOT_PANEL*>( curPage )->UpdatePlotColors();
+        // ensure it is truely a plot panel and not the welcome panel which is only SIM_PLOT_PANEL_BASE
+        SIM_PLOT_PANEL* panel = dynamic_cast<SIM_PLOT_PANEL*>( curPage );
+
+        if( panel != nullptr )
+        {
+            panel->UpdatePlotColors();
+        }
     }
 }