diff --git a/scripts/gen_regex.py b/scripts/gen_regex.py
index 5907b09..5340933 100644
--- a/scripts/gen_regex.py
+++ b/scripts/gen_regex.py
@@ -8,7 +8,7 @@ DATA_PATH = pathlib.Path(resource_filename('wordfreq', 'data'))
 def _emoji_char_class():
     """
     Build a regex for emoji substitution.  First we create a regex character set
-    (like "[a-cv-z]") matching characters we consider emoji The final regex
+    (like "[a-cv-z]") matching characters we consider emoji. The final regex
     matches one such character followed by any number of spaces and identical
     characters.
     """