diff --git a/src/gui/osutils/nixutils/NixUtils.h b/src/gui/osutils/nixutils/NixUtils.h
index 04cd08628..571af1a3a 100644
--- a/src/gui/osutils/nixutils/NixUtils.h
+++ b/src/gui/osutils/nixutils/NixUtils.h
@@ -82,7 +82,7 @@ private:
         PreferLight
     };
     ColorschemePref m_systemColorschemePref = ColorschemePref::PreferNone;
-    bool m_systemColorschemePrefExists;
+    bool m_systemColorschemePrefExists = false;
 
     void setColorScheme(QDBusVariant value);