diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index 5a2801e482..3ecaf18139 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -104,6 +104,10 @@
 #include "utils/timestamp.h"
 #include "utils/varlena.h"
 
+#ifdef WAL_DEBUG
+#include "utils/memutils.h"
+#endif
+
 /* timeline ID to be used when bootstrapping */
 #define BootstrapTimeLineID		1