diff --git a/pages/linux/man.md b/pages/linux/man.md
index c5fc60646a..db1698a794 100644
--- a/pages/linux/man.md
+++ b/pages/linux/man.md
@@ -7,7 +7,7 @@
 
 `man {{command}}`
 
-- Open the man page for a command in a browser:
+- Open the man page for a command in a browser (requires the `BROWSER` variable to be set):
 
 `man --html {{command}}`