diff --git a/runtime/doc/vim.man b/runtime/doc/vim.man
index e905a82..6ab20e9 100644
--- a/runtime/doc/vim.man
+++ b/runtime/doc/vim.man
@@ -345,6 +345,9 @@
                    GTK  GUI only: Use the GtkPlug mechanism to run gvim in an‐
                    other window.
 
+       --startuptime {file}
+                   During startup write timing messages to the file {fname}.
+
        --version   Print version information and exit.
 
 ON-LINE HELP