diff --git a/runtime/doc/ft_ps1.txt b/runtime/doc/ft_ps1.txt
index df1480b..3eb89a4 100644
--- a/runtime/doc/ft_ps1.txt
+++ b/runtime/doc/ft_ps1.txt
@@ -1,4 +1,4 @@
-*ps1.txt*  A Windows PowerShell syntax plugin for Vim
+*ft_ps1.txt*  A Windows PowerShell syntax plugin for Vim
 
 Author:  Peter Provost <https://www.github.com/PProvost>
 License: Apache 2.0