diff --git a/polyply/src/top_parser.py b/polyply/src/top_parser.py
index 428eba1d..d39e7b3a 100644
--- a/polyply/src/top_parser.py
+++ b/polyply/src/top_parser.py
@@ -392,6 +392,7 @@ def _molecule(self, line, lineno=0):
         Parses the lines of the [atoms] directive.
         """
         self.current_itp.append(line)
+
     def parse_error(self, line, lineno=0):
         """
         Parse the #error statement.