diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c
--- a/sys/kern/kern_sig.c
+++ b/sys/kern/kern_sig.c
@@ -1341,7 +1341,8 @@
 			break;
 		}
 
-		error = msleep(ps, &p->p_mtx, PPAUSE|PCATCH, "sigwait", timo);
+		error = msleep(&p->p_sigacts, &p->p_mtx, PPAUSE | PCATCH,
+		    "sigwait", timo);
 
 		/* The syscalls can not be restarted. */
 		if (error == ERESTART)