diff --git a/include/ui/egl-helpers.h b/include/ui/egl-helpers.h
index 5ad5dc30816..fed0deb1a8e 100644
--- a/include/ui/egl-helpers.h
+++ b/include/ui/egl-helpers.h
@@ -7,7 +7,7 @@
 extern EGLDisplay *qemu_egl_display;
 extern EGLConfig qemu_egl_config;
 
-EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win);
+EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, EGLNativeWindowType win);
 
 int qemu_egl_init_dpy(EGLNativeDisplayType dpy, bool gles, bool debug);
 EGLContext qemu_egl_init_ctx(void);
diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c
index 87d77afaa85..1691f7776e8 100644
--- a/ui/egl-helpers.c
+++ b/ui/egl-helpers.c
@@ -27,7 +27,7 @@ static int egl_debug;
 
 /* ---------------------------------------------------------------------- */
 
-EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win)
+EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, EGLNativeWindowType win)
 {
     EGLSurface esurface;
     EGLBoolean b;
@@ -36,7 +36,7 @@ EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win)
             (unsigned long) win);
     esurface = eglCreateWindowSurface(qemu_egl_display,
                                       qemu_egl_config,
-                                      (EGLNativeWindowType)win, NULL);
+                                      win, NULL);
     if (esurface == EGL_NO_SURFACE) {
         fprintf(stderr, "egl: eglCreateWindowSurface failed\n");
         return NULL;
diff --git a/ui/gtk-egl.c b/ui/gtk-egl.c
index 500c42c9fac..0d3ae039687 100644
--- a/ui/gtk-egl.c
+++ b/ui/gtk-egl.c
@@ -63,7 +63,8 @@ void gd_egl_init(VirtualConsole *vc)
     }
 
     vc->gfx.ectx = qemu_egl_init_ctx();
-    vc->gfx.esurface = qemu_egl_init_surface_x11(vc->gfx.ectx, x11_window);
+    vc->gfx.esurface = qemu_egl_init_surface_x11
+        (vc->gfx.ectx, (EGLNativeWindowType)x11_window);
 
     assert(vc->gfx.esurface);
 }