diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
index 03cbb680020fd..a2719c5060496 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
@@ -130,7 +130,7 @@ case class SortMergeJoin(
                 stop = true
               } else if (ordering.compare(leftKey, rightKey) > 0 || rightKey.anyNull) {
                 fetchRight()
-              } else { //if (ordering.compare(leftKey, rightKey) < 0 || leftKey.anyNull)
+              } else { // if (ordering.compare(leftKey, rightKey) < 0 || leftKey.anyNull)
                 fetchLeft()
               }
             }