diff --git a/Library/Homebrew/cask/dsl/depends_on.rb b/Library/Homebrew/cask/dsl/depends_on.rb
index 95a5d87db0..8e2280459a 100644
--- a/Library/Homebrew/cask/dsl/depends_on.rb
+++ b/Library/Homebrew/cask/dsl/depends_on.rb
@@ -24,7 +24,7 @@ module Cask
         intel:  { type: :intel, bits: 64 },
         # specific
         x86_64: { type: :intel, bits: 64 },
-        arm64: { type: :arm, bits: 64 },
+        arm64:  { type: :arm, bits: 64 },
       }.freeze
 
       attr_accessor :java