diff --git a/qt/MakeDialog.cc b/qt/MakeDialog.cc
index 4d0d193bb..08a4ab9f2 100644
--- a/qt/MakeDialog.cc
+++ b/qt/MakeDialog.cc
@@ -223,11 +223,9 @@ void MakeDialog::onSourceChanged()
         builder_.emplace(filename.toStdString());
     }
 
-    if (!builder_)
-    {
-        updatePiecesLabel();
-    }
-    else
+    updatePiecesLabel();
+
+    if (builder_)
     {
         ui_.pieceSizeSlider->setValue(log2(builder_->piece_size()));
     }