diff --git a/Library/Homebrew/livecheck/strategy/header_match.rb b/Library/Homebrew/livecheck/strategy/header_match.rb
index 7aedecac1c..f07103cc9a 100644
--- a/Library/Homebrew/livecheck/strategy/header_match.rb
+++ b/Library/Homebrew/livecheck/strategy/header_match.rb
@@ -55,7 +55,7 @@ module Homebrew
           end
 
           version = if block
-            block.call(data)
+            block.call(data[:headers])
           else
             data[:version]
           end