diff -uNr memcached-1.6.9/storage.c memcached-1.6.9.mod/storage.c
--- memcached-1.6.9/storage.c	2020-11-21 00:10:41.000000000 +0000
+++ memcached-1.6.9.mod/storage.c	2020-11-22 14:27:33.173582189 +0000
@@ -3,6 +3,7 @@
 #ifdef EXTSTORE
 
 #include "storage.h"
+#include "getsubopt.h"
 #include "extstore.h"
 #include <stdlib.h>
 #include <stdio.h>