diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
index 68ea47ceda..ccdb6bc5d4 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
@@ -78,7 +78,7 @@ trait Encoder[T] extends Serializable {
   def schema: StructType
 
   /**
-   * A ClassTag that can be used to construct and Array to contain a collection of `T`.
+   * A ClassTag that can be used to construct an Array to contain a collection of `T`.
    */
   def clsTag: ClassTag[T]
 }