diff --git a/src/core/iconmapper.h b/src/core/iconmapper.h
index cd8839f4..340d8148 100644
--- a/src/core/iconmapper.h
+++ b/src/core/iconmapper.h
@@ -17,7 +17,8 @@
  *
  */
 
-#pragma once
+#ifndef ICONMAPPER_H
+#define ICONMAPPER_H
 
 #include "config.h"
 
@@ -135,3 +136,6 @@ static const QMap<QString, IconProperties> iconmapper_ = {  // clazy:exclude=non
 };
 
 }  // namespace IconMapper
+
+#endif  // ICONMAPPER_H
+
diff --git a/src/core/stylehelper.h b/src/core/stylehelper.h
index 12fc774b..cd3fa35d 100644
--- a/src/core/stylehelper.h
+++ b/src/core/stylehelper.h
@@ -23,7 +23,6 @@
 **
 ****************************************************************************/
 
-//#pragma once
 #ifndef STYLEHELPER_H
 #define STYLEHELPER_H
 
diff --git a/src/core/translations.h b/src/core/translations.h
index 6e173144..c5595e85 100644
--- a/src/core/translations.h
+++ b/src/core/translations.h
@@ -17,7 +17,8 @@
  *
  */
 
-#pragma once
+#ifndef TRANSLATIONS_H
+#define TRANSLATIONS_H
 
 #include "config.h"
 
@@ -39,3 +40,5 @@ class Translations : public QObject {
   QList<QTranslator*> translations_;
 
 };
+
+#endif  // TRANSLATIONS_H