diff --git a/datafusion/optimizer/src/unwrap_cast_in_comparison.rs b/datafusion/optimizer/src/unwrap_cast_in_comparison.rs
index ec83cbab061b..542c29bd7767 100644
--- a/datafusion/optimizer/src/unwrap_cast_in_comparison.rs
+++ b/datafusion/optimizer/src/unwrap_cast_in_comparison.rs
@@ -134,7 +134,7 @@ fn add_alias_if_changed(original_name: &str, expr: Expr) -> Result<Expr> {
                 nulls_first,
             }
         }
-        expr => expr.alias(&original_name),
+        expr => expr.alias(original_name),
     })
 }