diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/windowExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/windowExpressions.scala
index 6396fde575b8f..c701d10b00b73 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/windowExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/windowExpressions.scala
@@ -825,7 +825,7 @@ case class NTile(buckets: Expression) extends RowNumberLike with SizeBasedWindow
     zero,
     zero,
     zero,
-    (n.cast(DecimalType.IntDecimal) / buckets.cast(DecimalType.IntDecimal)).cast(IntegerType),
+    (n div buckets).cast(IntegerType),
     (n % buckets).cast(IntegerType)
   )