diff --git a/Library/Homebrew/cask/lib/hbc/artifact/binary.rb b/Library/Homebrew/cask/lib/hbc/artifact/binary.rb
index f41b1b85b2624ba242540883a5ef884f784f81e9..21d123ab90a6b91d41d868903d3b24eb7e6de6ee 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