diff --git a/src/digest/digest.cr b/src/digest/digest.cr
index c55d2a84ead1..26e83621700a 100644
--- a/src/digest/digest.cr
+++ b/src/digest/digest.cr
@@ -191,11 +191,11 @@ abstract class Digest
   #
   # NOTE: `.dup.final` call may be used to get an intermediate hash value.
   #
-  # This method is restricted to a maximum digest size of 64 bits. Implementations that allow
+  # This method is restricted to a maximum digest size of 64 bytes. Implementations that allow
   # a larger digest size should override this method to use a larger buffer.
   def hexfinal(io : IO) : Nil
     if digest_size > 64
-      raise "Digest#hexfinal(IO) can't handle digest_size over 64 bits"
+      raise "Digest#hexfinal(IO) can't handle digest_size over 64 bytes"
     end
     sary = uninitialized StaticArray(UInt8, 128)
     tmp = sary.to_slice[0, digest_size * 2]