diff --git a/docs/reference/api-conventions.asciidoc b/docs/reference/api-conventions.asciidoc
index 5354bcfd7ea..e5a1be88123 100644
--- a/docs/reference/api-conventions.asciidoc
+++ b/docs/reference/api-conventions.asciidoc
@@ -106,6 +106,7 @@ GET /<logstash-{now/d}>/_search
 ======================================================
 The special characters used for date rounding must be url encoded as follows:
 
+[horizontal]
 `<`:: `%3C`
 `>`:: `%3E`
 `/`:: `%2F`