diff --git a/src/generic/plot.cpp b/src/generic/plot.cpp
index 0bcd6ef4c0..cf2dfddf96 100644
--- a/src/generic/plot.cpp
+++ b/src/generic/plot.cpp
@@ -438,7 +438,7 @@ void wxPlotWindow::OnPaint( wxPaintEvent &WXUNUSED(event) )
         {
             dc.DrawLine( pos.x-15, y, pos.x-7, y );
             wxString label;
-            label.Printf( "%.1f", current );
+            label.Printf( wxT("%.1f"), current );
             dc.DrawText( label, pos.x-45, y-7 );
         }
 
diff --git a/src/generic/prop.cpp b/src/generic/prop.cpp
index 12d9626903..ad6d3b521e 100644
--- a/src/generic/prop.cpp
+++ b/src/generic/prop.cpp
@@ -613,7 +613,7 @@ void wxPropertyValue::operator=(const wxString& val1)
   }
   else if (m_type == wxPropertyValueStringPtr)
   {
-    wxFAIL_MSG( "Shouldn't try to assign a wxString reference to a char* pointer.");
+    wxFAIL_MSG( wxT("Shouldn't try to assign a wxString reference to a char* pointer.") );
     if (val)
       *m_value.stringPtr = copystring(val);
     else