diff --git a/src/effects/vamp/VampEffect.cpp b/src/effects/vamp/VampEffect.cpp
index 8448cef50..2d02b1edf 100644
--- a/src/effects/vamp/VampEffect.cpp
+++ b/src/effects/vamp/VampEffect.cpp
@@ -444,8 +444,7 @@ bool VampEffect::Process()
 
       addedTracks.push_back(AddAnalysisTrack(
          multiple
-         ? wxString::Format(wxT("%s: %s"),
-            left->GetName(), GetName())
+         ? wxString::Format(_("%s: %s"), left->GetName(), GetName())
          : GetName()
       ));
       LabelTrack *ltrack = addedTracks.back()->get();
diff --git a/src/widgets/ASlider.cpp b/src/widgets/ASlider.cpp
index b0360521e..77a65a5d6 100644
--- a/src/widgets/ASlider.cpp
+++ b/src/widgets/ASlider.cpp
@@ -999,7 +999,7 @@ wxString LWSlider::GetTip(float value) const
 #endif
       }
 
-      label.Printf(wxT("%s: %s"), mName, val);
+      label.Printf(_("%s: %s"), mName, val);
    }
    else
    {
@@ -1042,7 +1042,7 @@ wxString LWSlider::GetMaxTip() const
 #endif
       }
 
-      label.Printf(wxT("%s: %s"), mName, val);
+      label.Printf(_("%s: %s"), mName, val);
    }
    else
    {