diff --git a/doc/hg.1.txt b/doc/hg.1.txt
--- a/doc/hg.1.txt
+++ b/doc/hg.1.txt
@@ -93,7 +93,7 @@ clone [-U] <source> [dest]::
     source and destination are on the same filesystem.
 
     options:
-    -U, --no-update   do not update the new working directory
+    -U, --noupdate   do not update the new working directory
 
 commit [-A -t -l <file> -t <text> -u <user> -d <datecode>] [files...]::
     Commit changes to the given files into the repository.