diff --git a/native/core/src/execution/datafusion/planner.rs b/native/core/src/execution/datafusion/planner.rs
index c2468b9be..a9c900b4f 100644
--- a/native/core/src/execution/datafusion/planner.rs
+++ b/native/core/src/execution/datafusion/planner.rs
@@ -1566,6 +1566,16 @@ impl PhysicalPlanner {
             ));
         }
 
+        // Cast sort expressions to Int64 to match DataFusion's window frame (offsets are Int64)
+        let cast_sort_exprs: Vec<PhysicalSortExpr> = sort_exprs.iter().map(|sort_expr| {
+            let expr = sort_expr.expr.clone();
+            let cast_expr = Arc::new(CastExpr::new(expr, DataType::Int64, None));
+            PhysicalSortExpr {
+                expr: cast_expr,
+                options: sort_expr.options.clone(),
+            }
+        }).collect();
+
         let window_func = match self.find_df_window_function(&window_func_name) {
             Some(f) => f,
             _ => {
@@ -1668,7 +1678,7 @@ impl PhysicalPlanner {
             &window_args,
             &[],
             partition_by,
-            sort_exprs,
+            &cast_sort_exprs,
             window_frame.into(),
             &input_schema,
             false, // TODO: Ignore nulls
diff --git a/spark/src/test/scala/org/apache/comet/exec/CometExecSuite.scala b/spark/src/test/scala/org/apache/comet/exec/CometExecSuite.scala
index 1258a9d16..3839e8a3c 100644
--- a/spark/src/test/scala/org/apache/comet/exec/CometExecSuite.scala
+++ b/spark/src/test/scala/org/apache/comet/exec/CometExecSuite.scala
@@ -113,11 +113,17 @@ class CometExecSuite extends CometTestBase {
           |(3, 1L, 1.0D, date("2017-08-01"), timestamp_seconds(1501545600), null)
           |AS testData(val, val_long, val_double, val_date, val_timestamp, cate)
           |""".stripMargin)
-      val df = sql("""
+      val df1 = sql("""
           |SELECT val, cate, count(val) OVER(PARTITION BY cate ORDER BY val ROWS CURRENT ROW)
           |FROM testData ORDER BY cate, val
           |""".stripMargin)
-      checkSparkAnswer(df)
+      checkSparkAnswer(df1)
+
+      // ORDER BY with RANGE frame
+      val df2 = sql("""
+          |SELECT val, cate, count(val) OVER(PARTITION BY cate ORDER BY val RANGE 1 PRECEDING) FROM testData
+          |""".stripMargin)
+      checkSparkAnswer(df2)
     }
   }