diff --git a/electrum/gui/qml/__init__.py b/electrum/gui/qml/__init__.py
index 5d9b2a0f6..3e2fe70bf 100644
--- a/electrum/gui/qml/__init__.py
+++ b/electrum/gui/qml/__init__.py
@@ -88,7 +88,9 @@ class ElectrumGui(Logger):
             QGuiApplication.setDesktopFileName('electrum.desktop')
         if hasattr(QtCore.Qt, "AA_EnableHighDpiScaling"):
             QtCore.QCoreApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling);
-        os.environ["QT_QUICK_CONTROLS_STYLE"] = "Material"
+
+        if not "QT_QUICK_CONTROLS_STYLE" in os.environ:
+            os.environ["QT_QUICK_CONTROLS_STYLE"] = "Material"
 
         self.gui_thread = threading.current_thread()
         self.config = config