diff --git a/include/boost/detail/utf8_codecvt_facet.hpp b/include/boost/detail/utf8_codecvt_facet.hpp
index 1de932c..e167c98 100644
--- a/include/boost/detail/utf8_codecvt_facet.hpp
+++ b/include/boost/detail/utf8_codecvt_facet.hpp
@@ -89,7 +89,7 @@
 namespace std {
     using ::codecvt;
     using ::mbstate_t;
-    using ::size_t
+    using ::size_t;
 }
 #endif