--- a/widget/gtk/nsWindow.cpp
+++ b/widget/gtk/nsWindow.cpp
@@ -3708,17 +3708,17 @@ nsWindow::Create(nsIWidget* aParent,
         bool useAlphaVisual = (mWindowType == eWindowType_popup &&
                                aInitData->mSupportTranslucency);
 
         // mozilla.widget.use-argb-visuals is a hidden pref defaulting to false
         // to allow experimentation
         if (Preferences::GetBool("mozilla.widget.use-argb-visuals", false))
             useAlphaVisual = true;
 
-#ifdef GL_PROVIDER_GLX
+#ifdef MOZ_X11
         // Ensure gfxPlatform is initialized, since that is what initializes
         // gfxVars, used below.
         Unused << gfxPlatform::GetPlatform();
 
         bool useWebRender = gfx::gfxVars::UseWebRender() &&
             AllowWebRenderForThisWindow();
 
         // If using WebRender on X11, we need to select a visual with a depth buffer,
@@ -3735,17 +3735,17 @@ nsWindow::Create(nsIWidget* aParent,
                                          &visualId)) {
                 // If we're using CSD, rendering will go through mContainer, but
                 // it will inherit this visual as it is a child of mShell.
                 gtk_widget_set_visual(mShell,
                                       gdk_x11_screen_lookup_visual(screen,
                                                                    visualId));
             }
         } else
-#endif // GL_PROVIDER_GLX
+#endif // MOZ_X11
         {
             if (useAlphaVisual) {
                 GdkScreen *screen = gtk_widget_get_screen(mShell);
                 if (gdk_screen_is_composited(screen)) {
                     GdkVisual *visual = gdk_screen_get_rgba_visual(screen);
                     gtk_widget_set_visual(mShell, visual);
                 }
             }