diff --git a/src/render/SDL_render.c b/src/render/SDL_render.c index 1bb4afa50c..653996981b 100644 --- a/src/render/SDL_render.c +++ b/src/render/SDL_render.c @@ -4306,8 +4306,13 @@ int SDL_SetRenderVSync(SDL_Renderer *renderer, int vsync) } if (!renderer->SetVSync || - renderer->SetVSync(renderer, vsync) < 0) { + renderer->SetVSync(renderer, vsync) != 0) { renderer->simulate_vsync = vsync ? SDL_TRUE : SDL_FALSE; + if (renderer->simulate_vsync) { + renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC; + } else { + renderer->info.flags &= ~SDL_RENDERER_PRESENTVSYNC; + } } else { renderer->simulate_vsync = SDL_FALSE; }