diff --git a/solr/solr-ref-guide/src/stream-decorator-reference.adoc b/solr/solr-ref-guide/src/stream-decorator-reference.adoc
index 1465b83b807..dc8d8a96137 100644
--- a/solr/solr-ref-guide/src/stream-decorator-reference.adoc
+++ b/solr/solr-ref-guide/src/stream-decorator-reference.adoc
@@ -1031,7 +1031,7 @@ The worker nodes can be from the same collection as the data, or they can be a d
           sort="year_i desc")
 ----
 
-The expression above shows a `parallel` function wrapping a `reduce` function. This will cause the `reduce` function to be run in parallel across 20 worker nodes.
+The expression above shows a `parallel` function wrapping a `rollup` function. This will cause the `rollup` function to be run in parallel across 20 worker nodes.
 
 .Warmup
 [TIP]