diff --git a/include/boost/config/compiler/pgi.hpp b/include/boost/config/compiler/pgi.hpp
index 6da0e0f4..611e77f1 100644
--- a/include/boost/config/compiler/pgi.hpp
+++ b/include/boost/config/compiler/pgi.hpp
@@ -8,7 +8,7 @@
 //  PGI C++ compiler setup:
 
 #define BOOST_COMPILER_VERSION __PGIC__##__PGIC_MINOR__
-#define BOOST_COMPILER "PGI compiler version " BOOST_STRINGIZE(_COMPILER_VERSION)
+#define BOOST_COMPILER "PGI compiler version " BOOST_STRINGIZE(BOOST_COMPILER_VERSION)
 
 //
 // Threading support: