diff --git a/libbeat/processors/actions/decode_json_fields.go b/libbeat/processors/actions/decode_json_fields.go
index 86712a81fee..078ec38f1cc 100644
--- a/libbeat/processors/actions/decode_json_fields.go
+++ b/libbeat/processors/actions/decode_json_fields.go
@@ -68,7 +68,7 @@ func init() {
 	processors.RegisterPlugin("decode_json_fields",
 		checks.ConfigChecked(NewDecodeJSONFields,
 			checks.RequireFields("fields"),
-			checks.AllowedFields("fields", "max_depth", "overwrite_keys", "add_error_key", "process_array", "target", "when")))
+			checks.AllowedFields("fields", "max_depth", "overwrite_keys", "add_error_key", "process_array", "target", "when", "document_id")))
 
 	jsprocessor.RegisterPlugin("DecodeJSONFields", NewDecodeJSONFields)
 }