diff --git a/scripts/vivado.mk b/scripts/vivado.mk
index 358973e..80131ca 100644
--- a/scripts/vivado.mk
+++ b/scripts/vivado.mk
@@ -180,6 +180,8 @@ sim: $(PROJECT).xpr gen_ip
 	echo "update_compile_order -fileset sources_1" >> run_sim.tcl
 	echo "update_compile_order -fileset sim_1" >> run_sim.tcl
 	echo "launch_simulation" >> run_sim.tcl
+	echo "run 1000 us" >> run_sim.tcl
+	echo "quit" >> run_sim.tcl
 	vivado -mode batch -source run_sim.tcl
 
 simclean: