diff --git a/src/bin/pg_upgrade/version.c b/src/bin/pg_upgrade/version.c
index 0028d518d0c..f185953a332 100644
--- a/src/bin/pg_upgrade/version.c
+++ b/src/bin/pg_upgrade/version.c
@@ -10,6 +10,8 @@
 #include "postgres_fe.h"
 
 #include "pg_upgrade.h"
+
+#include "catalog/pg_class.h"
 #include "fe_utils/string_utils.h"