diff --git a/Library/Homebrew/exceptions.rb b/Library/Homebrew/exceptions.rb
index a1fed4b862..83035aafff 100644
--- a/Library/Homebrew/exceptions.rb
+++ b/Library/Homebrew/exceptions.rb
@@ -149,7 +149,7 @@ end
 class ErrorDuringExecution < RuntimeError
 end
 
-# raised by Pathname#verify_checksum when cksum is nil or empty
+# raised by Pathname#verify_checksum when "expected" is nil or empty
 class ChecksumMissingError < ArgumentError
 end