diff --git a/include/interval.hpp b/include/interval.hpp
index 067811e..d3a14a6 100644
--- a/include/interval.hpp
+++ b/include/interval.hpp
@@ -101,10 +101,10 @@ constexpr interval<double>::interval() :
 namespace {
 
 template<typename R>
-constexpr checked_result<interval<R>> failed_result(
+constexpr checked_result<interval<R>> failed_result{
     exception_type::domain_error,
     "indefinite interval"
-);
+};
 
 // create constexpr versions of stl algorthms which are not (yet)
 // constexpr.
diff --git a/include/safe_base_operations.hpp b/include/safe_base_operations.hpp
index 33d6bdf..f271606 100644
--- a/include/safe_base_operations.hpp
+++ b/include/safe_base_operations.hpp
@@ -1457,12 +1457,14 @@ namespace {
     template<> struct Temp<unsigned char> {
         int value;
     }; // secondary template
+#if 0
     template<> struct Temp<signed wchar_t> {
         int value;
     }; // secondary template
     template<> struct Temp<unsigned wchar_t> {
         int value;
     }; // secondary template
+#endif
 }
 
 template<
diff --git a/include/utility.hpp b/include/utility.hpp
index 7b7ecab..985a784 100644
--- a/include/utility.hpp
+++ b/include/utility.hpp
@@ -46,7 +46,7 @@ namespace numeric {
         std::intmax_t Max
     >
     using signed_stored_type = typename boost::int_t<
-        std::max({log(Min), log(Max)})
+        std::max(log(Min), log(Max))
     >::least ;
 
     template<
@@ -54,7 +54,7 @@ namespace numeric {
         std::uintmax_t Max
     >
     using unsigned_stored_type = typename boost::uint_t<
-        std::max({log(Min), log(Max)})
+        std::max(log(Min), log(Max))
     >::least ;