diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala
index 90a0818b6b040..552b7814a0ad6 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala
@@ -29,7 +29,7 @@ case class UnaryPlus(child: Expression) extends UnaryExpression {
   override def toString = s"+$child"
 
   override def eval(input: Row): Any = {
-    n1(child, input, _)
+    n1(child, input, _.abs(_))
   }
 }