diff --git a/kernel/syscall.c b/kernel/syscall.c
index d36df35b..c2a3ca6b 100644
--- a/kernel/syscall.c
+++ b/kernel/syscall.c
@@ -2323,7 +2323,7 @@ static int ptrace_wakeup_sig(int pid, long request, long data) {
 	}
 	ihk_mc_spinlock_unlock(savelock, irqstate);
 
-	error = sched_wakeup_process(child, PS_TRACED);
+	error = sched_wakeup_process(child, PS_TRACED | PS_STOPPED);
 	if (error < 0) {
 		goto out;
 	}