diff --git a/src/main_wayland.cpp b/src/main_wayland.cpp
index 5a5ca2e532..147a84457f 100644
--- a/src/main_wayland.cpp
+++ b/src/main_wayland.cpp
@@ -717,6 +717,7 @@ int main(int argc, char * argv[])
     QObject::connect(&a, &KWin::Application::workspaceCreated, server, &KWin::WaylandServer::initWorkspace);
     if (!server->socketName().isEmpty()) {
         environment.insert(QStringLiteral("WAYLAND_DISPLAY"), server->socketName());
+        qputenv("WAYLAND_DISPLAY", server->socketName().toUtf8());
     }
     a.setProcessStartupEnvironment(environment);
 
diff --git a/src/xwl/xwayland.cpp b/src/xwl/xwayland.cpp
index 22261b5050..a406397d32 100644
--- a/src/xwl/xwayland.cpp
+++ b/src/xwl/xwayland.cpp
@@ -388,6 +388,8 @@ void Xwayland::handleXwaylandReady()
     auto env = m_app->processStartupEnvironment();
     env.insert(QStringLiteral("DISPLAY"), m_displayName);
     env.insert(QStringLiteral("XAUTHORITY"), m_xAuthority);
+    qputenv("DISPLAY", m_displayName.toUtf8());
+    qputenv("XAUTHORITY", m_xAuthority.toUtf8());
     m_app->setProcessStartupEnvironment(env);
 
     Xcb::sync(); // Trigger possible errors, there's still a chance to abort