diff --git a/Library/Homebrew/cmd/upgrade.rb b/Library/Homebrew/cmd/upgrade.rb
index bfe0aa8854..9aa4d07187 100644
--- a/Library/Homebrew/cmd/upgrade.rb
+++ b/Library/Homebrew/cmd/upgrade.rb
@@ -75,6 +75,9 @@ module Homebrew
           env:         :display_install_times,
           description: "Print install times for each package at the end of the run.",
         }],
+        [:switch, "--overwrite", {
+          description: "Delete files that already exist in the prefix while linking.",
+        }],
       ].each do |args|
         options = args.pop
         send(*args, **options)
@@ -229,6 +232,7 @@ module Homebrew
       keep_tmp:                   args.keep_tmp?,
       debug_symbols:              args.debug_symbols?,
       force:                      args.force?,
+      overwrite:                  args.overwrite?,
       debug:                      args.debug?,
       quiet:                      args.quiet?,
       verbose:                    args.verbose?,
diff --git a/Library/Homebrew/upgrade.rb b/Library/Homebrew/upgrade.rb
index 636efd6007..8116728fd0 100644
--- a/Library/Homebrew/upgrade.rb
+++ b/Library/Homebrew/upgrade.rb
@@ -27,6 +27,7 @@ module Homebrew
       keep_tmp: false,
       debug_symbols: false,
       force: false,
+      overwrite: false,
       debug: false,
       quiet: false,
       verbose: false
@@ -65,6 +66,7 @@ module Homebrew
             keep_tmp:,
             debug_symbols:,
             force:,
+            overwrite:,
             debug:,
             quiet:,
             verbose:,
@@ -150,6 +152,7 @@ module Homebrew
       keep_tmp: false,
       debug_symbols: false,
       force: false,
+      overwrite: false,
       debug: false,
       quiet: false,
       verbose: false
@@ -184,6 +187,7 @@ module Homebrew
           keep_tmp:,
           debug_symbols:,
           force:,
+          overwrite:,
           debug:,
           quiet:,
           verbose:,