diff --git a/src/lib/preferences/preferences.cpp b/src/lib/preferences/preferences.cpp
index dd2582ea9..3679ba4e3 100644
--- a/src/lib/preferences/preferences.cpp
+++ b/src/lib/preferences/preferences.cpp
@@ -348,7 +348,7 @@ Preferences::Preferences(BrowserWindow* window)
     //FONTS
     settings.beginGroup("Browser-Fonts");
     QWebEngineSettings* webSettings = QWebEngineSettings::defaultSettings();
-    auto defaultFont = [&](QWebEngineSettings::FontFamily font) {
+    auto defaultFont = [&](QWebEngineSettings::FontFamily font) -> const QString {
         const QString family = webSettings->fontFamily(font);
         if (!family.isEmpty())
             return family;