--- a/source/placeholders.rst
+++ b/source/placeholders.rst
@@ -463,7 +463,7 @@
   .. placeholder:: TXC
 
     All files generated by TeXnicCenter regarding the project. Currently only
-    the :file:`.tcp` and :file:`.tps` files. 
+    the :file:`.tcp`, :file:`.tps` and :file:`.tiw` files. 
 
   .. placeholder:: COF