Index: config/compiler/pgi.hpp
===================================================================
--- config/compiler/pgi.hpp	(revision 58299)
+++ config/compiler/pgi.hpp	(working copy)
@@ -18,6 +18,10 @@
 
 #if (__PGIC__ >= 7)
 
+#if (__PGIC__ >= 9)
+#define BOOST_HAS_THREADS
+#endif
+
 #define BOOST_FUNCTION_SCOPE_USING_DECLARATION_BREAKS_ADL 
 #define BOOST_NO_TWO_PHASE_NAME_LOOKUP
 #define BOOST_NO_SWPRINTF