diff --git a/datafusion/expr/src/utils.rs b/datafusion/expr/src/utils.rs
index 4db5061e8fe7..a48a809f17f6 100644
--- a/datafusion/expr/src/utils.rs
+++ b/datafusion/expr/src/utils.rs
@@ -463,7 +463,7 @@ pub fn expand_qualified_wildcard(
 /// if bool is true SortExpr comes from `PARTITION BY` column, if false comes from `ORDER BY` column
 type WindowSortKey = Vec<(Expr, bool)>;
 
-/// Generate a sort key for a given window expr's partition_by and order_bu expr
+/// Generate a sort key for a given window expr's partition_by and order_by expr
 pub fn generate_sort_key(
     partition_by: &[Expr],
     order_by: &[Expr],