diff --git a/kernel/system/do_sigsend.c b/kernel/system/do_sigsend.c
index 9e082b6f7..5e84bc374 100644
--- a/kernel/system/do_sigsend.c
+++ b/kernel/system/do_sigsend.c
@@ -77,6 +77,12 @@ message *m_ptr;			/* pointer to request message */
   rp->p_reg.sp = (reg_t) frp;
   rp->p_reg.pc = (reg_t) smsg.sm_sighandler;
 
+  /* Reschedule if necessary. */
+  if(rp->p_rts_flags & NO_PRIORITY) {
+	rp->p_rts_flags &= ~NO_PRIORITY;
+	if (rp->p_rts_flags == 0) lock_enqueue(rp);
+  } else kprintf("system: warning: sigsend a running process\n");
+
   return(OK);
 }