diff --git a/doc/misc/viper.texi b/doc/misc/viper.texi
index b0deb31d108..0e2473ddf3c 100644
--- a/doc/misc/viper.texi
+++ b/doc/misc/viper.texi
@@ -1842,7 +1842,7 @@ usually most effective:
 (set-face-background viper-replace-overlay-face "yellow")
 @end smallexample
 For a complete list of colors available to you, evaluate the expression
-@code{(x-defined-colors)}.  (Type it in the buffer @file{*scratch*} and then
+@code{(defined-colors)}.  (Type it in the buffer @file{*scratch*} and then
 hit the @kbd{C-j} key.
 
 @item viper-replace-overlay-cursor-color  "Red"