diff --git a/documentation/src/main/asciidoc/querylanguage/Expressions.adoc b/documentation/src/main/asciidoc/querylanguage/Expressions.adoc
index 962b7714604f..eac1d68adde6 100644
--- a/documentation/src/main/asciidoc/querylanguage/Expressions.adoc
+++ b/documentation/src/main/asciidoc/querylanguage/Expressions.adoc
@@ -1209,7 +1209,7 @@ However, we note that the following language constructs work with arrays, and ar
 |===
 
 [[functions-hash]]
-=== Hash functions
+==== Hash functions
 
 The following functions work on most supported platforms: