diff --git a/sample/calc.y b/sample/calc.y
index 4757ed9b..8135731d 100644
--- a/sample/calc.y
+++ b/sample/calc.y
@@ -1,6 +1,6 @@
 #
 #
-# Very simple calculater.
+# Very simple calculator.
 
 class Calcp
   prechigh