diff --git a/vvp/schedule.cc b/vvp/schedule.cc
index 955bae80e..bbc088b21 100644
--- a/vvp/schedule.cc
+++ b/vvp/schedule.cc
@@ -618,7 +618,7 @@ void schedule_simulate(void)
 
       signals_capture();
 
-      while (sched_list) {
+      if (schedule_runnable) while (sched_list) {
 
 	    if (schedule_stopped_flag) {
 		  schedule_stopped_flag = false;