diff --git a/PyTeX/format/constants.py b/PyTeX/format/constants.py
index 5b5e65a..046eec0 100644
--- a/PyTeX/format/constants.py
+++ b/PyTeX/format/constants.py
@@ -51,7 +51,7 @@ INS_FILE = [
     r'\endpostamble',
     r'\askforoverwritefalse',
     r''','''
-    r'\generate{{\file{{{{outfile}}}{{\from{{{infile}}}{{{guards}}}}}}}',
+    r'\generate{{\file{{{outfile}}}{{\from{{{infile}}}{{{guards}}}}}}}',
     r''','''
     r'\def\tmpa{{plain}}',
     r'\ifx\tmpa\fmtname\endgroup\expandafter\bye\fi',