diff --git a/boost/test/impl/execution_monitor.ipp b/boost/test/impl/execution_monitor.ipp
index f4d05c1322..a80c52cd7e 100644
--- a/boost/test/impl/execution_monitor.ipp
+++ b/boost/test/impl/execution_monitor.ipp
@@ -53,17 +53,12 @@ namespace std { using ::strerror; using ::strlen; using ::strncat; }
 #endif
 
 // to use vsnprintf
-#if defined(__SUNPRO_CC) || defined(__SunOS)
+#if defined(__SUNPRO_CC) || defined(__SunOS) || defined(__QNXNTO__)
 #  include <stdio.h>
 #  include <stdarg.h>
 using std::va_list;
 #endif
 
-// to use vsnprintf 
-#if defined(__QNXNTO__) 
-#  include <stdio.h> 
-#endif
-
 #if defined(_WIN32) && !defined(BOOST_DISABLE_WIN32) &&                  \
     (!defined(__COMO__) && !defined(__MWERKS__) && !defined(__GNUC__) || \
      BOOST_WORKAROUND(__MWERKS__, >= 0x3000))