diff --git a/ptulsconv/docparser/pt_doc_parser.py b/ptulsconv/docparser/pt_doc_parser.py
index 2a5cdaf..abb5a9e 100644
--- a/ptulsconv/docparser/pt_doc_parser.py
+++ b/ptulsconv/docparser/pt_doc_parser.py
@@ -86,7 +86,7 @@ protools_text_export_grammar = Grammar(
                              "COMMENTS" rs
 
     marker_record = integer_value isp fs string_value fs integer_value isp fs
-                    string_value fs string_value fs (string_value fs 
+                    string_value fs string_value fs (string_value fs
                     string_value fs)? string_value rs
 
     fs = "\t"