diff --git a/src/backend/access/transam/timeline.c b/src/backend/access/transam/timeline.c
index 89d31c5a1bf..810467d474d 100644
--- a/src/backend/access/transam/timeline.c
+++ b/src/backend/access/transam/timeline.c
@@ -32,6 +32,7 @@
 
 #include "postgres.h"
 
+#include <sys/stat.h>
 #include <stdio.h>
 #include <unistd.h>
 
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index b3519b04b33..8889b79c78d 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -15,12 +15,10 @@
 #include "postgres.h"
 
 #include <ctype.h>
-#include <signal.h>
 #include <time.h>
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/time.h>
-#include <sys/wait.h>
 #include <unistd.h>
 
 #include "access/clog.h"
diff --git a/src/backend/access/transam/xlogarchive.c b/src/backend/access/transam/xlogarchive.c
index e72795783fc..93aca7375c3 100644
--- a/src/backend/access/transam/xlogarchive.c
+++ b/src/backend/access/transam/xlogarchive.c
@@ -16,6 +16,7 @@
 
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/wait.h>
 #include <signal.h>
 #include <unistd.h>