diff --git a/bin/pt-config-diff b/bin/pt-config-diff
index f4d7be39..7b219586 100755
--- a/bin/pt-config-diff
+++ b/bin/pt-config-diff
@@ -5051,12 +5051,7 @@ sub main {
    # Daemonize now that everything is setup and ready to work.
    # ########################################################################
    my $daemon;
-   if ( $o->get('daemonize') ) {
-      $daemon = new Daemon(o=>$o);
-      $daemon->daemonize();
-      PTDEBUG && _d('I am a daemon now');
-   }
-   elsif ( $o->get('pid') ) {
+   if ( $o->get('pid') ) {
       # We're not daemoninzing, it just handles PID stuff.
       $daemon = new Daemon(o=>$o);
       $daemon->make_PID_file();
@@ -5147,7 +5142,7 @@ pt-config-diff - Diff MySQL configuration files and server variables.
 
 =head1 SYNOPSIS
 
-Usage: pt-config-diff [OPTION...] CONFIG CONFIG [CONFIG...]
+Usage: pt-config-diff [OPTIONS] CONFIG CONFIG [CONFIG...]
 
 pt-config-diff diffs MySQL configuration files and server variables.
 CONFIG can be a filename or a DSN.  At least two CONFIG sources must be given.
@@ -5267,11 +5262,6 @@ Read this comma-separated list of config files; if specified, this must be the
 first option on the command line.  (This option does not specify a CONFIG;
 it's equivalent to C<--defaults-file>.)
 
-=item --daemonize
-
-Fork to the background and detach from the shell.  POSIX
-operating systems only.
-
 =item --defaults-file
 
 short form: -F; type: string
@@ -5305,11 +5295,11 @@ Password to use for connection.
 
 type: string
 
-Create the given PID file when daemonized.  The file contains the process
-ID of the daemonized instance.  The PID file is removed when the
-daemonized instance exits.  The program checks for the existence of the
-PID file when starting; if it exists and the process with the matching PID
-exists, the program exits.
+Create the given PID file.  The tool won't start if the PID file already
+exists and the PID it contains is different than the current PID.  However,
+if the PID file exists and the PID it contains is no longer running, the
+tool will overwrite the PID file with the current PID.  The PID file is
+removed automatically when the tool exits.
 
 =item --port