Index: pglogical_apply_spi.c
--- pglogical_apply_spi.c.orig	2021-05-04 10:47:32.000000000 +0200
+++ pglogical_apply_spi.c	2021-05-15 14:39:48.545926000 +0200
@@ -16,6 +16,8 @@
  */
 #include <stdio.h>
 #include <unistd.h>
+#include <sys/types.h>
+#include <netinet/in.h>
 
 #include "postgres.h"
 
Index: pglogical_fe.c
--- pglogical_fe.c.orig	2021-05-15 14:39:48.546099000 +0200
+++ pglogical_fe.c	2021-05-15 14:40:03.748704000 +0200
@@ -10,6 +10,8 @@
  *
  *-------------------------------------------------------------------------
  */
+#include <sys/types.h>
+#include <sys/wait.h>
 #include "libpq-fe.h"
 #include "postgres_fe.h"