diff --git a/PyTeX/format/generic_text.py b/PyTeX/format/generic_text.py
index 8e36452..9e09c01 100644
--- a/PyTeX/format/generic_text.py
+++ b/PyTeX/format/generic_text.py
@@ -71,7 +71,7 @@ class GenericText:
             try:
                 line = '% ' + line.rstrip().format(**kwargs)
                 if padding:
-                    line = line.ljust(77) + ' %'
+                    line = line.ljust(79) + '%'
                 if len(line) > 80:
                     logger.warning(
                         'Line too long')  # TODO