Add missing #include.

diff --git a/src/backend/access/transam/xact.c b/src/backend/access/transam/xact.c
index e2746289536a6ac0834bc82556c2b71fc32dbd10..5270fc2df6a47d2fc75a593e3fbf81d22bc170b3 100644 (file)
--- a/src/backend/access/transam/xact.c
+++ b/src/backend/access/transam/xact.c
@@ -154,6 +154,7 @@
  */
 #include "postgres.h"
 
+#include <unistd.h>
 #include <sys/time.h>
 
 #include "access/gistscan.h"