diff --git a/main/main.cpp b/main/main.cpp
index d9932e480ce..90d9abe5dbf 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -892,6 +892,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	}
 
 	video_mode.use_vsync = GLOBAL_DEF("display/window/vsync/use_vsync", true);
+	OS::get_singleton()->_use_vsync = video_mode.use_vsync;
 
 	GLOBAL_DEF("rendering/quality/intended_usage/framebuffer_allocation", 2);
 	GLOBAL_DEF("rendering/quality/intended_usage/framebuffer_allocation.mobile", 3);