kc3-lang/SDL

diff --git a/src/render/SDL_render.c b/src/render/SDL_render.c
index 0930d80..c0b0032 100644
--- a/src/render/SDL_render.c
+++ b/src/render/SDL_render.c
@@ -4575,6 +4575,7 @@ SDL_RenderSetVSync(SDL_Renderer * renderer, int vsync)
     }
 
     renderer->wanted_vsync = vsync ? SDL_TRUE : SDL_FALSE;
+    renderer->last_present = 0;
 
     if (!renderer->SetVSync ||
         renderer->SetVSync(renderer, vsync) < 0) {