diff --git a/contrib/earthdistance/expected/earthdistance.out b/contrib/earthdistance/expected/earthdistance.out
index 9bd556fc224..6a589247341 100644
--- a/contrib/earthdistance/expected/earthdistance.out
+++ b/contrib/earthdistance/expected/earthdistance.out
@@ -9,6 +9,7 @@
 --
 CREATE EXTENSION earthdistance;  -- fail, must install cube first
 ERROR:  required extension "cube" is not installed
+HINT:  Use CREATE EXTENSION CASCADE to install required extensions too.
 CREATE EXTENSION cube;
 CREATE EXTENSION earthdistance;
 --