diff --git a/include/boost/regex/v4/regex_traits_defaults.hpp b/include/boost/regex/v4/regex_traits_defaults.hpp
index e58d6bae..361ade96 100644
--- a/include/boost/regex/v4/regex_traits_defaults.hpp
+++ b/include/boost/regex/v4/regex_traits_defaults.hpp
@@ -141,7 +141,7 @@ inline bool is_separator<char>(char c)
 BOOST_REGEX_DECL std::string BOOST_REGEX_CALL lookup_default_collate_name(const std::string& name);
 
 //
-// get the state_id of a character clasification, the individual
+// get the state_id of a character classification, the individual
 // traits classes then transform that state_id into a bitmask:
 //
 template <class charT>