diff --git a/Manuals/Tcar-fs/en_US/tcar-fs.conf b/Manuals/Tcar-fs/en_US/tcar-fs.conf
index be16cab..9fc2c03 100755
--- a/Manuals/Tcar-fs/en_US/tcar-fs.conf
+++ b/Manuals/Tcar-fs/en_US/tcar-fs.conf
@@ -7,6 +7,10 @@
 
 [main]
 
+# Specify documentation backend used by documentation manual. This is
+# the format used to write documentation manual source files.
+manual_backend = "texinfo"
+
 # Specify title style used by sections inside the manual.  Possible
 # values to this option are `cap-each-word' to capitalize each word in
 # the section title, `cap-first-word' to capitalize the first word in