diff --git a/oxenmq/base32z.h b/oxenmq/base32z.h
index 074e522..70f019c 100644
--- a/oxenmq/base32z.h
+++ b/oxenmq/base32z.h
@@ -136,7 +136,7 @@ constexpr bool is_base32z(std::string_view s) { return is_base32z<>(s); }
 
 /// Converts a sequence of base32z digits to bytes.  Undefined behaviour if any characters are not
 /// valid base32z alphabet characters.  It is permitted for the input and output ranges to overlap
-/// as long as `out` is no earlier than `begin`.  Note that if you pass in a sequence that could not
+/// as long as `out` is no later than `begin`.  Note that if you pass in a sequence that could not
 /// have been created by a base32z encoding of a byte sequence, we treat the excess bits as if they
 /// were not provided.
 ///
diff --git a/oxenmq/base64.h b/oxenmq/base64.h
index de703ae..c9538a6 100644
--- a/oxenmq/base64.h
+++ b/oxenmq/base64.h
@@ -165,7 +165,7 @@ constexpr bool is_base64(std::string_view s) { return is_base64(s.begin(), s.end
 
 /// Converts a sequence of base64 digits to bytes.  Undefined behaviour if any characters are not
 /// valid base64 alphabet characters.  It is permitted for the input and output ranges to overlap as
-/// long as `out` is no earlier than `begin`.  Trailing padding characters are permitted but not
+/// long as `out` is no later than `begin`.  Trailing padding characters are permitted but not
 /// required.
 ///
 /// It is possible to provide "impossible" base64 encoded values; for example "YWJja" which has 30
diff --git a/oxenmq/hex.h b/oxenmq/hex.h
index fdfad3f..68cf7e7 100644
--- a/oxenmq/hex.h
+++ b/oxenmq/hex.h
@@ -131,7 +131,7 @@ constexpr char from_hex_pair(unsigned char a, unsigned char b) noexcept { return
 
 /// Converts a sequence of hex digits to bytes.  Undefined behaviour if any characters are not in
 /// [0-9a-fA-F] or if the input sequence length is not even: call `is_hex` first if you need to
-/// check.  It is permitted for the input and output ranges to overlap as long as out is no earlier
+/// check.  It is permitted for the input and output ranges to overlap as long as out is no later
 /// than begin.
 template <typename InputIt, typename OutputIt>
 void from_hex(InputIt begin, InputIt end, OutputIt out) {