diff --git a/include/boost/config/platform/hpux.hpp b/include/boost/config/platform/hpux.hpp
index 25cd8ebc..19ce68e5 100644
--- a/include/boost/config/platform/hpux.hpp
+++ b/include/boost/config/platform/hpux.hpp
@@ -23,6 +23,8 @@
 
 #if !(defined(__HP_aCC) || !defined(_INCLUDE__STDC_A1_SOURCE))
 #  define BOOST_NO_SWPRINTF
+#endif
+#if defined(__HP_aCC) && !defined(_INCLUDE__STDC_A1_SOURCE)
 #  define BOOST_NO_CWCTYPE
 #endif
 
@@ -82,3 +84,4 @@
 #ifndef BOOST_HAS_EXPM1
 #  define BOOST_HAS_EXPM1
 #endif
+