diff --git a/pgsql/pc_pgsql.c b/pgsql/pc_pgsql.c
index fe842bb..edb5495 100644
--- a/pgsql/pc_pgsql.c
+++ b/pgsql/pc_pgsql.c
@@ -20,6 +20,7 @@
 #include "utils/lsyscache.h"
 #include "utils/memutils.h"
 #include "utils/fmgroids.h"
+#include "catalog/indexing.h"
 #include "catalog/namespace.h"
 #include "commands/extension.h"
 #include "catalog/pg_extension.h"