diff --git a/datafusion/physical-plan/src/joins/sort_merge_join.rs b/datafusion/physical-plan/src/joins/sort_merge_join.rs
index af7538b3c340c..28eab0505e0b8 100644
--- a/datafusion/physical-plan/src/joins/sort_merge_join.rs
+++ b/datafusion/physical-plan/src/joins/sort_merge_join.rs
@@ -1615,6 +1615,7 @@ mod tests {
             left,
             right,
             on,
+            None,
             join_type,
             sort_options,
             null_equals_null,