diff --git a/src/base/preferences.cpp b/src/base/preferences.cpp
index 180c40dd4..296241191 100644
--- a/src/base/preferences.cpp
+++ b/src/base/preferences.cpp
@@ -61,12 +61,14 @@
 
 namespace
 {
+#ifdef Q_OS_WIN
     QString makeProfileID(const QString &profilePath, const QString &profileName)
     {
         return profilePath.isEmpty()
                 ? profileName
                 : profileName + QLatin1Char('@') + Utils::Fs::toValidFileSystemName(profilePath, false, {});
     }
+#endif
 }
 
 Preferences *Preferences::m_instance = nullptr;
@@ -90,7 +92,7 @@ void Preferences::freeInstance()
     m_instance = nullptr;
 }
 
-const QVariant Preferences::value(const QString &key, const QVariant &defaultValue) const
+QVariant Preferences::value(const QString &key, const QVariant &defaultValue) const
 {
     return SettingsStorage::instance()->loadValue(key, defaultValue);
 }
diff --git a/src/base/preferences.h b/src/base/preferences.h
index ff8263ecf..8769bc5e4 100644
--- a/src/base/preferences.h
+++ b/src/base/preferences.h
@@ -30,6 +30,7 @@
 #pragma once
 
 #include <QtContainerFwd>
+#include <QtGlobal>
 #include <QVariant>
 
 #include "base/utils/net.h"
@@ -80,7 +81,7 @@ class Preferences : public QObject
 
     Preferences();
 
-    const QVariant value(const QString &key, const QVariant &defaultValue = {}) const;
+    QVariant value(const QString &key, const QVariant &defaultValue = {}) const;
     void setValue(const QString &key, const QVariant &value);
 
     static Preferences *m_instance;