diff --git a/src/main/scala/scalatutorial/sections/LexicalScopes.scala b/src/main/scala/scalatutorial/sections/LexicalScopes.scala
index 94f76263..37583c55 100644
--- a/src/main/scala/scalatutorial/sections/LexicalScopes.scala
+++ b/src/main/scala/scalatutorial/sections/LexicalScopes.scala
@@ -159,7 +159,7 @@ object LexicalScopes extends ScalaTutorialSection {
    * = Top-Level Definitions =
    *
    * In real Scala programs, `def` and `val` definitions must be written
-   * within a top-level ''object definition'', in .scala file:
+   * within a top-level ''object definition'', in a .scala file:
    *
    * {{{
    *   object MyExecutableProgram {