diff --git a/Library/Homebrew/rubocops/checksum.rb b/Library/Homebrew/rubocops/checksum.rb
index e8035b8ee3..be355b7abc 100644
--- a/Library/Homebrew/rubocops/checksum.rb
+++ b/Library/Homebrew/rubocops/checksum.rb
@@ -32,7 +32,11 @@ module RuboCop
             return
           end
 
-          if string_content(checksum).size != 64 && regex_match_group(checksum, /^\w*$/)
+          checksum_string = string_content(checksum)
+
+          return if checksum_string == "cellar"
+
+          if checksum_string.size != 64 && regex_match_group(checksum, /^\w*$/)
             problem "sha256 should be 64 characters"
           end