diff --git a/pgxn/neon/walproposer_pg.c b/pgxn/neon/walproposer_pg.c
index c46fd9b3ec..002bf4e2ce 100644
--- a/pgxn/neon/walproposer_pg.c
+++ b/pgxn/neon/walproposer_pg.c
@@ -549,9 +549,10 @@ walprop_pg_init_standalone_sync_safekeepers(void)
 static void
 walprop_sigusr2(SIGNAL_ARGS)
 {
+	int			save_errno = errno;
 	got_SIGUSR2 = true;
-
 	SetLatch(MyLatch);
+	errno = save_errno;
 }
 
 static void