diff --git a/src/render_ogl.c b/src/render_ogl.c
index 3b12980..8c0392d 100644
--- a/src/render_ogl.c
+++ b/src/render_ogl.c
@@ -788,6 +788,8 @@ static void ogl_render()
 
         fpsl_frame_end();
     }
+
+    InterlockedExchange(&g_ddraw->upscale_hack_active, FALSE);
 }
 
 static void ogl_delete_context(HGLRC context)