diff --git a/lxqt-session/src/main.cpp b/lxqt-session/src/main.cpp
index 16849399..489bab84 100644
--- a/lxqt-session/src/main.cpp
+++ b/lxqt-session/src/main.cpp
@@ -51,6 +51,7 @@ session-eggwm.conf
 */
 int main(int argc, char **argv)
 {
+    qputenv("QT_NO_XDG_DESKTOP_PORTAL", QByteArrayLiteral("1"));
     SessionApplication app(argc, argv);
 
     QCommandLineParser parser;
diff --git a/lxqt-session/src/sessionapplication.cpp b/lxqt-session/src/sessionapplication.cpp
index 9eb9a60b..1bd237a2 100644
--- a/lxqt-session/src/sessionapplication.cpp
+++ b/lxqt-session/src/sessionapplication.cpp
@@ -83,6 +83,7 @@ bool SessionApplication::startup()
         QMessageBox::warning(nullptr, tr("DBus Environment"),
                 tr("The DBus Activation Environment wasn't updated. Some apps might not work properly"));
     }
+    qunsetenv("QT_NO_XDG_DESKTOP_PORTAL");
 
     // loadFontSettings(settings);
 
@@ -348,6 +349,9 @@ bool SessionApplication::updateDBusEnvironment()
 {
     qCDebug(SESSION) << "Updating DBus activation environment:";
     QProcess p;
+    QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
+    env.remove(QStringLiteral("QT_NO_XDG_DESKTOP_PORTAL"));
+    p.setProcessEnvironment(env);
     p.setProgram(QStringLiteral("dbus-update-activation-environment"));
     p.setArguments(QStringList(QStringLiteral("--all")));
     p.start();