diff --git a/src/about_dice_project.rb b/src/about_dice_project.rb
index 98717ba..b458147 100644
--- a/src/about_dice_project.rb
+++ b/src/about_dice_project.rb
@@ -56,7 +56,7 @@ class AboutDiceProject < Neo::Koan
     #
     # If the rolls are random, then it is possible (although not
     # likely) that two consecutive rolls are equal.  What would be a
-    # better way to test this.
+    # better way to test this?
   end
 
   def test_you_can_roll_different_numbers_of_dice