diff --git a/sql/api/src/main/scala/org/apache/spark/sql/util/ArrowUtils.scala b/sql/api/src/main/scala/org/apache/spark/sql/util/ArrowUtils.scala
index d9bd3b0e612b..6852fe09ef96 100644
--- a/sql/api/src/main/scala/org/apache/spark/sql/util/ArrowUtils.scala
+++ b/sql/api/src/main/scala/org/apache/spark/sql/util/ArrowUtils.scala
@@ -51,7 +51,7 @@ private[sql] object ArrowUtils {
     case BinaryType if !largeVarTypes => ArrowType.Binary.INSTANCE
     case _: StringType if largeVarTypes => ArrowType.LargeUtf8.INSTANCE
     case BinaryType if largeVarTypes => ArrowType.LargeBinary.INSTANCE
-    case DecimalType.Fixed(precision, scale) => new ArrowType.Decimal(precision, scale)
+    case DecimalType.Fixed(precision, scale) => new ArrowType.Decimal(precision, scale, 8 * 16)
     case DateType => new ArrowType.Date(DateUnit.DAY)
     case TimestampType if timeZoneId == null =>
       throw SparkException.internalError("Missing timezoneId where it is mandatory.")