diff --git a/runtime/doc/vi_diff.txt b/runtime/doc/vi_diff.txt
index 0365a90..18566fc 100644
--- a/runtime/doc/vi_diff.txt
+++ b/runtime/doc/vi_diff.txt
@@ -411,7 +411,7 @@
 	etc., etc.  See |eval|.
 	Debugging and profiling are supported. |debug-scripts| |profile|
 	If this is not enough, an interface is provided to |Python|, |Ruby|,
-	|Tcl|, |Perl| and |MzScheme|.
+	|Tcl|, |Lua|, |Perl| and |MzScheme|.
 
 Viminfo.						|viminfo-file|
 	The command-line history, marks and registers can be stored in a file