diff --git a/src/hnswbuild.c b/src/hnswbuild.c
index 947f52e..4842a6c 100644
--- a/src/hnswbuild.c
+++ b/src/hnswbuild.c
@@ -44,6 +44,7 @@
 #include "access/xact.h"
 #include "access/xloginsert.h"
 #include "catalog/index.h"
+#include "catalog/pg_type_d.h"
 #include "commands/progress.h"
 #include "hnsw.h"
 #include "miscadmin.h"