diff --git a/filebeat/docs/filebeat-filtering.asciidoc b/filebeat/docs/filebeat-filtering.asciidoc
index 28c4334b7b9..b90673ff302 100644
--- a/filebeat/docs/filebeat-filtering.asciidoc
+++ b/filebeat/docs/filebeat-filtering.asciidoc
@@ -98,7 +98,7 @@ filebeat.prospectors:
 
 processors:
   - decode_json_fields:
-      fields: ['inner']
+      fields: ["inner"]
 
 output.console.pretty: true
 -----------------------------------------------------