diff --git a/processing/src/main/java/org/apache/druid/query/aggregation/AggregatorFactory.java b/processing/src/main/java/org/apache/druid/query/aggregation/AggregatorFactory.java
index 023cb1654e0a..3e54f449d6c9 100644
--- a/processing/src/main/java/org/apache/druid/query/aggregation/AggregatorFactory.java
+++ b/processing/src/main/java/org/apache/druid/query/aggregation/AggregatorFactory.java
@@ -87,7 +87,7 @@ public VectorAggregator factorizeVector(VectorColumnSelectorFactory selectorFact
    */
   public AggregatorAndSize factorizeWithSize(ColumnSelectorFactory metricFactory)
   {
-    return new AggregatorAndSize(factorize(metricFactory), getMaxIntermediateSize());
+    return new AggregatorAndSize(factorize(metricFactory), guessAggregatorHeapFootprint(0));
   }
 
   /**