diff --git a/src/binary_formats.ml b/src/binary_formats.ml
index 43c1b409..e7d107ee 100644
--- a/src/binary_formats.ml
+++ b/src/binary_formats.ml
@@ -32,7 +32,7 @@
       with the algorithm specified in RFC 8785. The resulting bytes are
       terminated with a single 0-byte and then hashed with SHA512."
    - from the code it looks like its the same for all stringy-strings
-     !! that are not raw bytes data
+     !! not strings that are raw-bytes-data-like
  *)
 
 module UTIL = struct