diff --git a/Library/Homebrew/cask/lib/hbc/artifact/binary.rb b/Library/Homebrew/cask/lib/hbc/artifact/binary.rb
index f41b1b85b2..21d123ab90 100644
--- a/Library/Homebrew/cask/lib/hbc/artifact/binary.rb
+++ b/Library/Homebrew/cask/lib/hbc/artifact/binary.rb
@@ -13,7 +13,7 @@ module Hbc
         if source.writable?
           FileUtils.chmod "+x", source
         else
-          @command.run!.run("/bin/chmod", args: ["+x", source], sudo: true)
+          @command.run!("/bin/chmod", args: ["+x", source], sudo: true)
         end
       end
     end