diff --git a/common/properties/pg_properties.cpp b/common/properties/pg_properties.cpp
index 03b02385c0..4e9c3c65ce 100644
--- a/common/properties/pg_properties.cpp
+++ b/common/properties/pg_properties.cpp
@@ -101,7 +101,7 @@ wxPGProperty* PGPropertyFactory( const PROPERTY_BASE* aProperty )
         else if( typeId == TYPE_HASH( bool ) )
         {
             ret = new wxBoolProperty();
-            ret->SetAttribute( wxT( "UseCheckbox" ), true );
+            ret->SetAttribute( wxPG_BOOL_USE_CHECKBOX, true );
         }
         else if( typeId == TYPE_HASH( wxString ) )
         {
diff --git a/eeschema/dialogs/dialog_sim_model.cpp b/eeschema/dialogs/dialog_sim_model.cpp
index 6c0857ddbe..3c65d5ecd8 100644
--- a/eeschema/dialogs/dialog_sim_model.cpp
+++ b/eeschema/dialogs/dialog_sim_model.cpp
@@ -812,13 +812,13 @@ wxPGProperty* DIALOG_SIM_MODEL<T>::newParamProperty( int aParamIndex ) const
         break;
     }
 
-    prop->SetAttribute( wxPG_ATTR_UNITS, param.info.unit );
+    prop->SetAttribute( wxPG_ATTR_UNITS, wxString::FromUTF8( param.info.unit.c_str() ) );
 
     // Legacy due to the way we extracted the parameters from Ngspice.
     if( param.isOtherVariant )
-        prop->SetCell( 3, wxString( param.info.defaultValueOfOtherVariant ) );
+        prop->SetCell( 3, wxString::FromUTF8( param.info.defaultValueOfOtherVariant ) );
     else
-        prop->SetCell( 3, wxString( param.info.defaultValue ) );
+        prop->SetCell( 3, wxString::FromUTF8( param.info.defaultValue ) );
 
     wxString typeStr;