diff --git a/doc/changes.qbk b/doc/changes.qbk
index aadeb97..f7ab411 100644
--- a/doc/changes.qbk
+++ b/doc/changes.qbk
@@ -174,4 +174,9 @@
 * Ongoing work on improving `hash_combine`. This changes the combine function
   which was previously defined in the reference documentation.
 
+[h2 Boost 1.58.0]
+
+* Fixed strict aliasing violation
+  ([@https://github.com/boostorg/functional/pull/3 GitHub #3]).
+
 [endsect]
diff --git a/include/boost/functional/hash/detail/hash_float.hpp b/include/boost/functional/hash/detail/hash_float.hpp
index ee0ee87..eb9264f 100644
--- a/include/boost/functional/hash/detail/hash_float.hpp
+++ b/include/boost/functional/hash/detail/hash_float.hpp
@@ -68,7 +68,7 @@ namespace boost
             std::size_t seed = 0;
 
             if (length >= sizeof(std::size_t)) {
-                seed = *(std::size_t*) ptr;
+                std::memcpy(&seed, ptr, sizeof(std::size_t));
                 length -= sizeof(std::size_t);
                 ptr += sizeof(std::size_t);