diff --git a/libs/locale/src/util/gregorian.cpp b/libs/locale/src/util/gregorian.cpp
index 9a99cab..580efac 100644
--- a/libs/locale/src/util/gregorian.cpp
+++ b/libs/locale/src/util/gregorian.cpp
@@ -150,7 +150,7 @@ namespace util {
             gregorian_calendar(std::string const &terr)
             {
                 first_day_of_week_ = first_day_of_week(terr.c_str());
-                time_ = time(0);
+                time_ = std::time(0);
                 is_local_ = true;
                 tzoff_ = 0;
                 from_time(time_);
@@ -237,7 +237,7 @@ namespace util {
                     val.tm_wday = -1; // indecator of error
                     std::time_t point = -1;
                     if(is_local_) {
-                        point = mktime(&val);
+                        point = std::mktime(&val);
                         if(point == static_cast<std::time_t>(-1)){
                             #ifndef BOOST_WINDOWS
                             // windows does not handle negative time_t, under other plaforms
diff --git a/libs/locale/src/util/numeric.hpp b/libs/locale/src/util/numeric.hpp
index ee5bb51..892427d 100644
--- a/libs/locale/src/util/numeric.hpp
+++ b/libs/locale/src/util/numeric.hpp
@@ -130,13 +130,13 @@ private:
                 return ret_ptr;
             }
         case flags::date:
-            return format_time(out,ios,fill,static_cast<time_t>(val),'x');
+            return format_time(out,ios,fill,static_cast<std::time_t>(val),'x');
         case flags::time:
-            return format_time(out,ios,fill,static_cast<time_t>(val),'X');
+            return format_time(out,ios,fill,static_cast<std::time_t>(val),'X');
         case flags::datetime:
-            return format_time(out,ios,fill,static_cast<time_t>(val),'c');
+            return format_time(out,ios,fill,static_cast<std::time_t>(val),'c');
         case flags::strftime:
-            return format_time(out,ios,fill,static_cast<time_t>(val),info.date_time_pattern<char_type>());
+            return format_time(out,ios,fill,static_cast<std::time_t>(val),info.date_time_pattern<char_type>());
         case flags::currency:
             {
                 bool nat =  info.currency_flags()==flags::currency_default