diff --git a/ui/sdl2-2d.c b/ui/sdl2-2d.c
index 95930061ea..8ab68d67b9 100644
--- a/ui/sdl2-2d.c
+++ b/ui/sdl2-2d.c
@@ -116,6 +116,9 @@ void sdl2_2d_switch(DisplayChangeListener *dcl,
     case PIXMAN_r8g8b8x8:
         format = SDL_PIXELFORMAT_RGBA8888;
         break;
+    case PIXMAN_b8g8r8x8:
+        format = SDL_PIXELFORMAT_BGRX8888;
+        break;
     default:
         g_assert_not_reached();
     }