diff --git a/src/include/storage/standby.h b/src/include/storage/standby.h
index 2b1f340b82..94d33851d0 100644
--- a/src/include/storage/standby.h
+++ b/src/include/storage/standby.h
@@ -14,6 +14,7 @@
 #ifndef STANDBY_H
 #define STANDBY_H
 
+#include "datatype/timestamp.h"
 #include "storage/lock.h"
 #include "storage/procsignal.h"
 #include "storage/relfilenode.h"