diff --git a/eeschema/sim/sim_plot_frame.cpp b/eeschema/sim/sim_plot_frame.cpp
index c327d332e3..5dec678973 100644
--- a/eeschema/sim/sim_plot_frame.cpp
+++ b/eeschema/sim/sim_plot_frame.cpp
@@ -2,6 +2,7 @@
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 2016 CERN
+ * Copyright (C) 2016-2017 KiCad Developers, see AUTHORS.txt for contributors.
  * @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
  * @author Maciej Suminski <maciej.suminski@cern.ch>
  *
@@ -446,7 +447,7 @@ void SIM_PLOT_FRAME::removePlot( const wxString& aPlotName, bool aErase )
         traceMap.erase( traceIt );
     }
 
-    wxASSERT( plotPanel->IsShown( aPlotName ) );
+    wxASSERT( plotPanel->TraceShown( aPlotName ) );
     plotPanel->DeleteTrace( aPlotName );
     plotPanel->Fit();
 
diff --git a/eeschema/sim/sim_plot_panel.h b/eeschema/sim/sim_plot_panel.h
index 3c3caa029b..77873d64f5 100644
--- a/eeschema/sim/sim_plot_panel.h
+++ b/eeschema/sim/sim_plot_panel.h
@@ -197,7 +197,7 @@ public:
 
     void DeleteAllTraces();
 
-    bool IsShown( const wxString& aName ) const
+    bool TraceShown( const wxString& aName ) const
     {
         return m_traces.count( aName ) > 0;
     }