diff --git a/preserves-binary.md b/preserves-binary.md
index 80d9fe1..0f33c7f 100644
--- a/preserves-binary.md
+++ b/preserves-binary.md
@@ -289,8 +289,8 @@ undetermined number of `Value`s across, say, a TCP/IP connection:
      A0 - False
      A1 - True
      A2 - Float or Double (length disambiguates)
-     A3 - SignedIntegers (0 is encoded with no bytes at all)
-     A4 - String (no trailing NUL is added)
+     A3 - SignedIntegers (0 may be encoded with no bytes at all)
+     A4 - String (a trailing NUL is added)
      A5 - ByteString
      A6 - Symbol