diff --git a/PyTeX/format/constants.py b/PyTeX/format/constants.py
index 7f70042..5b5e65a 100644
--- a/PyTeX/format/constants.py
+++ b/PyTeX/format/constants.py
@@ -39,7 +39,6 @@ INS_FILE = [
     r'\begingroup',
     r'\input docstrip.tex',
     r'\keepsilent',
-    r'\usedir{{{directory}}}',
     r'\preamble',
     r'___________________________________________________________',
     r'{preamble}',