diff --git a/encodings/runend/src/compute/fill_null.rs b/encodings/runend/src/compute/fill_null.rs
index a2215465e..ea41b270b 100644
--- a/encodings/runend/src/compute/fill_null.rs
+++ b/encodings/runend/src/compute/fill_null.rs
@@ -10,8 +10,8 @@ impl FillNullFn<RunEndArray> for RunEndEncoding {
         Ok(RunEndArray::with_offset_and_length(
             array.ends(),
             fill_null(array.values(), fill_value)?,
-            array.len(),
             array.offset(),
+            array.len(),
         )?
         .into_array())
     }