diff --git a/exercises/bob/description.md b/exercises/bob/description.md
index 25a56c4736..5a811811b5 100644
--- a/exercises/bob/description.md
+++ b/exercises/bob/description.md
@@ -10,3 +10,5 @@ He says 'Fine. Be that way!' if you address him without actually saying
 anything.
 
 He answers 'Whatever.' to anything else.
+
+Bob's conversational partner is a purist when it comes to written communication and always follows normal rules regarding sentence punctuation in English.