diff --git a/Library/Homebrew/dev-cmd/prof.rb b/Library/Homebrew/dev-cmd/prof.rb
index d5134d3150..d75f59e9dd 100644
--- a/Library/Homebrew/dev-cmd/prof.rb
+++ b/Library/Homebrew/dev-cmd/prof.rb
@@ -8,20 +8,19 @@ module Homebrew
   def prof_args
     Homebrew::CLI::Parser.new do
       usage_banner <<~EOS
-        `prof` <command>
+        `prof` [<command>]
 
         Run Homebrew with the Ruby profiler, e.g. `brew prof readall`.
       EOS
-      min_named 1
     end
   end
 
   def prof
-    prof_args.parse
+    args = prof_args.parse
 
     Homebrew.install_gem_setup_path! "ruby-prof", version: "0.18.0"
     FileUtils.mkdir_p "prof"
     brew_rb = (HOMEBREW_LIBRARY_PATH/"brew.rb").resolved_path
-    safe_system "ruby-prof", "--printer=multi", "--file=prof", brew_rb, "--", *ARGV
+    safe_system "ruby-prof", "--printer=multi", "--file=prof", brew_rb, "--", *args.named
   end
 end
diff --git a/docs/Manpage.md b/docs/Manpage.md
index ba63f33318..02685058b2 100644
--- a/docs/Manpage.md
+++ b/docs/Manpage.md
@@ -966,7 +966,7 @@ Apply the bottle commit and publish bottles to Bintray.
 * `--root-url`:
   Use the specified *`URL`* as the root of the bottle's URL instead of Homebrew's default.
 
-### `prof` *`command`*
+### `prof` [*`command`*]
 
 Run Homebrew with the Ruby profiler, e.g. `brew prof readall`.
 
diff --git a/manpages/brew-cask.1 b/manpages/brew-cask.1
index f00c80f3ed..f35a505d79 100644
--- a/manpages/brew-cask.1
+++ b/manpages/brew-cask.1
@@ -1,7 +1,7 @@
 .\" generated with Ronn/v0.7.3
 .\" http://github.com/rtomayko/ronn/tree/0.7.3
 .
-.TH "BREW\-CASK" "1" "July 2020" "Homebrew" "brew-cask"
+.TH "BREW\-CASK" "1" "August 2020" "Homebrew" "brew-cask"
 .
 .SH "NAME"
 \fBbrew\-cask\fR \- a friendly binary installer for macOS
diff --git a/manpages/brew.1 b/manpages/brew.1
index 277ff7733d..1263c78ec3 100644
--- a/manpages/brew.1
+++ b/manpages/brew.1
@@ -1,7 +1,7 @@
 .\" generated with Ronn/v0.7.3
 .\" http://github.com/rtomayko/ronn/tree/0.7.3
 .
-.TH "BREW" "1" "July 2020" "Homebrew" "brew"
+.TH "BREW" "1" "August 2020" "Homebrew" "brew"
 .
 .SH "NAME"
 \fBbrew\fR \- The Missing Package Manager for macOS
@@ -1285,7 +1285,7 @@ Upload to the specified Bintray organisation (default: \fBhomebrew\fR)\.
 \fB\-\-root\-url\fR
 Use the specified \fIURL\fR as the root of the bottle\'s URL instead of Homebrew\'s default\.
 .
-.SS "\fBprof\fR \fIcommand\fR"
+.SS "\fBprof\fR [\fIcommand\fR]"
 Run Homebrew with the Ruby profiler, e\.g\. \fBbrew prof readall\fR\.
 .
 .SS "\fBrelease\-notes\fR [\fIoptions\fR] [\fIprevious_tag\fR] [\fIend_ref\fR]"