diff --git a/src/backends/x11/common/eglonxbackend.cpp b/src/backends/x11/common/eglonxbackend.cpp
index 76400c8125..6708282932 100644
--- a/src/backends/x11/common/eglonxbackend.cpp
+++ b/src/backends/x11/common/eglonxbackend.cpp
@@ -31,7 +31,6 @@ EglOnXBackend::EglOnXBackend(Display *display)
     , m_connection(connection())
     , m_x11Display(display)
     , m_rootWindow(rootWindow())
-    , m_x11ScreenNumber(kwinApp()->x11ScreenNumber())
 {
     // Egl is always direct rendering
     setIsDirectRendering(true);
@@ -44,7 +43,6 @@ EglOnXBackend::EglOnXBackend(xcb_connection_t *connection, Display *display, xcb
     , m_connection(connection)
     , m_x11Display(display)
     , m_rootWindow(rootWindow)
-    , m_x11ScreenNumber(screenNumber)
     , m_renderingWindow(renderingWindow)
 {
     // Egl is always direct rendering
diff --git a/src/backends/x11/common/eglonxbackend.h b/src/backends/x11/common/eglonxbackend.h
index b2b1f12c5b..a2c8264abf 100644
--- a/src/backends/x11/common/eglonxbackend.h
+++ b/src/backends/x11/common/eglonxbackend.h
@@ -60,7 +60,6 @@ private:
     xcb_connection_t *m_connection;
     Display *m_x11Display;
     xcb_window_t m_rootWindow;
-    int m_x11ScreenNumber;
     xcb_window_t m_renderingWindow = XCB_WINDOW_NONE;
     bool m_havePlatformBase = false;
 };