diff --git a/doc/multiprecision.qbk b/doc/multiprecision.qbk
index a556f1fb..58700f7b 100644
--- a/doc/multiprecision.qbk
+++ b/doc/multiprecision.qbk
@@ -4974,6 +4974,8 @@ Windows Vista machine.
 [h4 Multiprecision-2.2.5 (Boost-1.59)]
 
 * Depricated boost/multiprecision/random.hpp as it's no longer needed, updated random examples to match.
+* Fixed a bug in cpp_int's right shift operator when shifting negative values - semantics now gives the
+same values as shifting 2's compliment integers, though not the same bit pattern.
 
 [h4 Multiprecision-2.2.4 (Boost-1.58)]