diff --git a/src/backend/replication/walsender.c b/src/backend/replication/walsender.c
index 16c2a7681ec..53e134538f4 100644
--- a/src/backend/replication/walsender.c
+++ b/src/backend/replication/walsender.c
@@ -1370,7 +1370,7 @@ WalSndSignals(void)
 	pqsignal(SIGINT, SIG_IGN);	/* not used */
 	pqsignal(SIGTERM, WalSndShutdownHandler);	/* request shutdown */
 	pqsignal(SIGQUIT, WalSndQuickDieHandler);	/* hard crash time */
-	pqsignal(SIGALRM, SIG_IGN);
+	pqsignal(SIGALRM, handle_sig_alarm);
 	pqsignal(SIGPIPE, SIG_IGN);
 	pqsignal(SIGUSR1, WalSndXLogSendHandler);	/* request WAL sending */
 	pqsignal(SIGUSR2, WalSndLastCycleHandler);	/* request a last cycle and