diff --git a/eeschema/dialogs/dialog_sim_settings.cpp b/eeschema/dialogs/dialog_sim_settings.cpp
index f67582653a..78bafc0fa1 100644
--- a/eeschema/dialogs/dialog_sim_settings.cpp
+++ b/eeschema/dialogs/dialog_sim_settings.cpp
@@ -96,7 +96,7 @@ bool DIALOG_SIM_SETTINGS::TransferDataFromWindow()
         // At least one source has to be enabled
         if( !m_dcEnable1->IsChecked() && !m_dcEnable2->IsChecked() )
         {
-            DisplayError( this, wxT( "You need to enable at least one source" ) );
+            DisplayError( this, _( "You need to enable at least one source" ) );
             return false;
         }
 
@@ -106,7 +106,7 @@ bool DIALOG_SIM_SETTINGS::TransferDataFromWindow()
         {
             if( empty( m_dcSource1 ) )
             {
-                DisplayError( this, wxT( "You need to select DC source (sweep 1)" ) );
+                DisplayError( this, _( "You need to select DC source (sweep 1)" ) );
                 return false;
             }
 
@@ -136,7 +136,7 @@ bool DIALOG_SIM_SETTINGS::TransferDataFromWindow()
         {
             if( empty( m_dcSource2 ) )
             {
-                DisplayError( this, wxT( "You need to select DC source (sweep 2)" ) );
+                DisplayError( this, _( "You need to select DC source (sweep 2)" ) );
                 return false;
             }
 
diff --git a/eeschema/sim/spice_value.cpp b/eeschema/sim/spice_value.cpp
index 18017cc5ba..3296b7b0aa 100644
--- a/eeschema/sim/spice_value.cpp
+++ b/eeschema/sim/spice_value.cpp
@@ -37,12 +37,12 @@ SPICE_VALUE::SPICE_VALUE( const wxString& aString )
     char buf[8] = { 0, };
 
     if( aString.IsEmpty() )
-        throw std::invalid_argument( "Spice value cannot be empty" );
+        throw std::invalid_argument( _( "Spice value cannot be empty" ) );
 
     LOCALE_IO dummy;    // All numeric values should be in "C" locale(decimal separator = .)
 
     if( sscanf( (const char*) aString.c_str(), "%lf%7s", &m_base, buf ) == 0 )
-        throw std::invalid_argument( "Invalid Spice value string" );
+        throw std::invalid_argument( _( "Invalid Spice value string" ) );
 
     if( *buf == 0 )
     {
@@ -75,7 +75,7 @@ SPICE_VALUE::SPICE_VALUE( const wxString& aString )
             case 't': m_prefix = PFX_TERA; break;
 
             default:
-                throw std::invalid_argument( "Invalid unit prefix" );
+                throw std::invalid_argument( _( "Invalid unit prefix" ) );
         }
     }