diff --git a/src/show.c b/src/show.c
index ffcd0038..083962e5 100644
--- a/src/show.c
+++ b/src/show.c
@@ -635,6 +635,10 @@ show_instance_json(parray *backup_list)
 			json_add_value(buf, "primary_conninfo", backup->primary_conninfo,
 						   json_level, true);
 
+		if (backup->external_dir_str)
+			json_add_value(buf, "external-dirs", backup->external_dir_str,
+						   json_level, true);
+
 		json_add_value(buf, "status", status2str(backup->status), json_level,
 					   true);