diff --git a/arrow-array/src/array/byte_view_array.rs b/arrow-array/src/array/byte_view_array.rs
index fbd2fa3ebd04..6bc77a02f619 100644
--- a/arrow-array/src/array/byte_view_array.rs
+++ b/arrow-array/src/array/byte_view_array.rs
@@ -319,6 +319,8 @@ impl<T: ByteViewType + ?Sized> GenericByteViewArray<T> {
 
     /// Returns an iterator over the prefix bytes of this array with respect to the prefix length.
     /// If the prefix length is larger than the string length, it will return None.
+    ///
+    /// Note for null views, it returns None.
     pub fn prefix_bytes_iter(&self, prefix_len: usize) -> impl Iterator<Item = Option<&[u8]>> {
         self.views().into_iter().map(move |v| {
             let len = (*v as u32) as usize;