diff --git a/eeschema/dialogs/dialog_sim_command.cpp b/eeschema/dialogs/dialog_sim_command.cpp
index 7929e6ace7..ed3f5ba02e 100644
--- a/eeschema/dialogs/dialog_sim_command.cpp
+++ b/eeschema/dialogs/dialog_sim_command.cpp
@@ -197,7 +197,7 @@ void DIALOG_SIM_COMMAND::SetPlotSettings( const SIM_TAB* aSimTab )
             m_lockY1->SetLabel( wxString::Format( m_lockY1->GetLabel(), plotTab->GetLabelY1() ) );
             m_y1Units->SetLabel( plotTab->GetUnitsY1() );
 
-            double min, max;
+            double min = 0.0, max = 0.0;
             bool   locked = plotTab->GetY1Scale( &min, &max );
             m_lockY1->SetValue( locked );
 
@@ -214,7 +214,7 @@ void DIALOG_SIM_COMMAND::SetPlotSettings( const SIM_TAB* aSimTab )
             m_lockY2->SetLabel( wxString::Format( m_lockY2->GetLabel(), plotTab->GetLabelY2() ) );
             m_y2Units->SetLabel( plotTab->GetUnitsY2() );
 
-            double min, max;
+            double min = 0.0, max = 0.0;
             bool   locked = plotTab->GetY2Scale( &min, &max );
             m_lockY2->SetValue( locked );
 
@@ -231,7 +231,7 @@ void DIALOG_SIM_COMMAND::SetPlotSettings( const SIM_TAB* aSimTab )
             m_lockY3->SetLabel( wxString::Format( m_lockY3->GetLabel(), plotTab->GetLabelY3() ) );
             m_y3Units->SetLabel( plotTab->GetUnitsY3() );
 
-            double min, max;
+            double min = 0.0, max = 0.0;
             bool   locked = plotTab->GetY3Scale( &min, &max );
             m_lockY3->SetValue( locked );
 
diff --git a/eeschema/sch_io/kicad_sexpr/sch_io_kicad_sexpr_parser.cpp b/eeschema/sch_io/kicad_sexpr/sch_io_kicad_sexpr_parser.cpp
index c4804d4828..4c6649a406 100644
--- a/eeschema/sch_io/kicad_sexpr/sch_io_kicad_sexpr_parser.cpp
+++ b/eeschema/sch_io/kicad_sexpr/sch_io_kicad_sexpr_parser.cpp
@@ -4296,7 +4296,7 @@ void SCH_IO_KICAD_SEXPR_PARSER::parseSchTextBoxContent( SCH_TEXTBOX* aTextBox )
             break;
 
         default:
-            if( SCH_TABLECELL* cell = dynamic_cast<SCH_TABLECELL*>( aTextBox ) )
+            if( dynamic_cast<SCH_TABLECELL*>( aTextBox ) != nullptr )
                 Expecting( "at, size, stroke, fill, effects, span or uuid" );
             else
                 Expecting( "at, size, stroke, fill, effects or uuid" );
diff --git a/pcbnew/pcb_io/kicad_sexpr/pcb_io_kicad_sexpr_parser.cpp b/pcbnew/pcb_io/kicad_sexpr/pcb_io_kicad_sexpr_parser.cpp
index db32b69728..fe43bc3ec0 100644
--- a/pcbnew/pcb_io/kicad_sexpr/pcb_io_kicad_sexpr_parser.cpp
+++ b/pcbnew/pcb_io/kicad_sexpr/pcb_io_kicad_sexpr_parser.cpp
@@ -3516,7 +3516,7 @@ void PCB_IO_KICAD_SEXPR_PARSER::parseTextBoxContent( PCB_TEXTBOX* aTextBox )
             break;
 
         default:
-            if( PCB_TABLECELL* cell = dynamic_cast<PCB_TABLECELL*>( aTextBox ) )
+            if( dynamic_cast<PCB_TABLECELL*>( aTextBox ) != nullptr )
                 Expecting( "locked, start, pts, angle, width, layer, effects, span, render_cache, uuid or tstamp" );
             else
                 Expecting( "locked, start, pts, angle, width, layer, effects, render_cache, uuid or tstamp" );