diff --git a/presto-main/src/main/java/com/facebook/presto/operator/TopNRowNumberOperator.java b/presto-main/src/main/java/com/facebook/presto/operator/TopNRowNumberOperator.java
index e7b82cded9f69..d7edea2f201ce 100644
--- a/presto-main/src/main/java/com/facebook/presto/operator/TopNRowNumberOperator.java
+++ b/presto-main/src/main/java/com/facebook/presto/operator/TopNRowNumberOperator.java
@@ -296,9 +296,6 @@ public void addInput(Page page)
     @Override
     public ListenableFuture<?> startMemoryRevoke()
     {
-        if (finishing) {
-            return NOT_BLOCKED;
-        }
         return groupedTopNBuilder.startMemoryRevoke();
     }