diff --git a/bench/tests/deltablue.lua b/bench/tests/deltablue.lua
index 2602fd89..37ba5d66 100644
--- a/bench/tests/deltablue.lua
+++ b/bench/tests/deltablue.lua
@@ -222,7 +222,7 @@ end
 --
 -- Normal constraints are not input constraints.  An input constraint
 -- is one that depends on external state, such as the mouse, the
--- keybord, a clock, or some arbitraty piece of imperative code.
+-- keybord, a clock, or some arbitrary piece of imperative code.
 --
 function Constraint:isInput ()
 	 return false