diff --git a/include/BarModelEditor.h b/include/BarModelEditor.h
index b854cf932..4681a62b1 100644
--- a/include/BarModelEditor.h
+++ b/include/BarModelEditor.h
@@ -22,6 +22,11 @@
  *
  */
 
+#pragma once
+
+#ifndef LMMS_GUI_BAR_MODEL_EDITOR_H
+#define LMMS_GUI_BAR_MODEL_EDITOR_H
+
 #include "FloatModelEditorBase.h"
 
 
@@ -47,4 +52,6 @@ private:
 	QString const m_text;
 };
 
-}
+} // namespace lmms::gui
+
+#endif // LMMS_GUI_BAR_MODEL_EDITOR_H
diff --git a/src/gui/widgets/BarModelEditor.cpp b/src/gui/widgets/BarModelEditor.cpp
index b22e8f33e..32995b22d 100644
--- a/src/gui/widgets/BarModelEditor.cpp
+++ b/src/gui/widgets/BarModelEditor.cpp
@@ -67,4 +67,4 @@ void BarModelEditor::paintEvent(QPaintEvent *event)
 	painter.drawText(textRect, m_text);
 }
 
-}
+} // namespace lmms::gui