diff --git a/include/boost/thread/detail/thread.hpp b/include/boost/thread/detail/thread.hpp
index 46d96693..46294102 100644
--- a/include/boost/thread/detail/thread.hpp
+++ b/include/boost/thread/detail/thread.hpp
@@ -594,7 +594,7 @@ namespace boost
 #endif
 
 #if defined BOOST_THREAD_USES_DATETIME
-        inline BOOST_SYMBOL_VISIBLE void sleep(xtime const& abs_time)
+        inline BOOST_SYMBOL_VISIBLE void sleep(::boost::xtime const& abs_time)
         {
             sleep(system_time(abs_time));
         }
diff --git a/include/boost/thread/pthread/condition_variable.hpp b/include/boost/thread/pthread/condition_variable.hpp
index 285785ff..c11383f0 100644
--- a/include/boost/thread/pthread/condition_variable.hpp
+++ b/include/boost/thread/pthread/condition_variable.hpp
@@ -249,7 +249,7 @@ namespace boost
 #endif
         }
         template<typename lock_type>
-        bool timed_wait(lock_type& m,xtime const& abs_time)
+        bool timed_wait(lock_type& m,::boost::xtime const& abs_time)
         {
             return timed_wait(m,system_time(abs_time));
         }
@@ -309,7 +309,7 @@ namespace boost
         }
 
         template<typename lock_type,typename predicate_type>
-        bool timed_wait(lock_type& m,xtime const& abs_time, predicate_type pred)
+        bool timed_wait(lock_type& m,::boost::xtime const& abs_time, predicate_type pred)
         {
             return timed_wait(m,system_time(abs_time),pred);
         }
diff --git a/include/boost/thread/pthread/condition_variable_fwd.hpp b/include/boost/thread/pthread/condition_variable_fwd.hpp
index dc471d56..08b15834 100644
--- a/include/boost/thread/pthread/condition_variable_fwd.hpp
+++ b/include/boost/thread/pthread/condition_variable_fwd.hpp
@@ -128,7 +128,7 @@ namespace boost
         }
         bool timed_wait(
             unique_lock<mutex>& m,
-            xtime const& abs_time)
+            ::boost::xtime const& abs_time)
         {
             return timed_wait(m,system_time(abs_time));
         }
@@ -194,7 +194,7 @@ namespace boost
         template<typename predicate_type>
         bool timed_wait(
             unique_lock<mutex>& m,
-            xtime const& abs_time,predicate_type pred)
+            ::boost::xtime const& abs_time,predicate_type pred)
         {
             return timed_wait(m,system_time(abs_time),pred);
         }
diff --git a/include/boost/thread/xtime.hpp b/include/boost/thread/xtime.hpp
index 9c6a3596..d6b7ad10 100644
--- a/include/boost/thread/xtime.hpp
+++ b/include/boost/thread/xtime.hpp
@@ -57,17 +57,17 @@ struct xtime
 
 };
 
-inline xtime get_xtime(boost::system_time const& abs_time)
+inline ::boost::xtime get_xtime(boost::system_time const& abs_time)
 {
-    xtime res;
+    ::boost::xtime res;
     boost::posix_time::time_duration const time_since_epoch=abs_time-boost::posix_time::from_time_t(0);
 
-    res.sec=static_cast<xtime::xtime_sec_t>(time_since_epoch.total_seconds());
-    res.nsec=static_cast<xtime::xtime_nsec_t>(time_since_epoch.fractional_seconds()*(1000000000/time_since_epoch.ticks_per_second()));
+    res.sec=static_cast<::boost::xtime::xtime_sec_t>(time_since_epoch.total_seconds());
+    res.nsec=static_cast<::boost::xtime::xtime_nsec_t>(time_since_epoch.fractional_seconds()*(1000000000/time_since_epoch.ticks_per_second()));
     return res;
 }
 
-inline int xtime_get(struct xtime* xtp, int clock_type)
+inline int xtime_get(struct ::boost::xtime* xtp, int clock_type)
 {
     if (clock_type == TIME_UTC_)
     {
@@ -78,7 +78,7 @@ inline int xtime_get(struct xtime* xtp, int clock_type)
 }
 
 
-inline int xtime_cmp(const xtime& xt1, const xtime& xt2)
+inline int xtime_cmp(const ::boost::xtime& xt1, const ::boost::xtime& xt2)
 {
     if (xt1.sec == xt2.sec)
         return (int)(xt1.nsec - xt2.nsec);
diff --git a/src/pthread/thread.cpp b/src/pthread/thread.cpp
index f8fc44a1..b77f28df 100644
--- a/src/pthread/thread.cpp
+++ b/src/pthread/thread.cpp
@@ -470,7 +470,7 @@ namespace boost
 #   elif defined(BOOST_HAS_PTHREAD_YIELD)
             BOOST_VERIFY(!pthread_yield());
 //#   elif defined BOOST_THREAD_USES_DATETIME
-//            xtime xt;
+//            ::boost::xtime xt;
 //            xtime_get(&xt, TIME_UTC_);
 //            sleep(xt);
 //            sleep_for(chrono::milliseconds(0));