diff --git a/datafusion/physical-optimizer/src/enforce_distribution.rs b/datafusion/physical-optimizer/src/enforce_distribution.rs
index 1f6ea61c099bd..fd5ef6eda5704 100644
--- a/datafusion/physical-optimizer/src/enforce_distribution.rs
+++ b/datafusion/physical-optimizer/src/enforce_distribution.rs
@@ -1274,11 +1274,6 @@ pub fn ensure_distribution(
                 }
                 Distribution::HashPartitioned(exprs) => {
                     // See https://github.com/apache/datafusion/issues/18341#issuecomment-3503238325 for background
-                    if add_roundrobin && !hash_necessary {
-                        // Add round-robin repartitioning on top of the operator
-                        // to increase parallelism.
-                        child = add_roundrobin_on_top(child, target_partitions)?;
-                    }
                     // When inserting hash is necessary to satisfy hash requirement, insert hash repartition.
                     if hash_necessary {
                         child =