--- a/initd/init.c.orig	2018-07-01 22:24:02.065349814 +0000
+++ b/initd/init.c	2018-07-01 22:23:02.837917724 +0000
@@ -77,6 +77,7 @@
 	sigaction(SIGTERM, &sa_shutdown, NULL);
 	sigaction(SIGUSR1, &sa_shutdown, NULL);
 	sigaction(SIGUSR2, &sa_shutdown, NULL);
+	sigaction(SIGPWR, &sa_shutdown, NULL);
 
 	early();
 	cmdline();
--- a/signal.c.orig	2018-03-28 09:29:49.000000000 +0000
+++ b/signal.c	2018-07-01 22:23:23.357720944 +0000
@@ -44,6 +44,7 @@
 		break;
 	case SIGUSR1:
 	case SIGUSR2:
+	case SIGPWR:
 		event = RB_POWER_OFF;
 		msg = "poweroff";
 		break;
@@ -90,6 +91,7 @@
 	sigaction(SIGINT, &sa_shutdown, NULL);
 	sigaction(SIGUSR1, &sa_shutdown, NULL);
 	sigaction(SIGUSR2, &sa_shutdown, NULL);
+	sigaction(SIGPWR, &sa_shutdown, NULL);
 	sigaction(SIGSEGV, &sa_crash, NULL);
 	sigaction(SIGBUS, &sa_crash, NULL);
 	sigaction(SIGHUP, &sa_dummy, NULL);