diff --git a/boost/boost/test/impl/debug.ipp b/boost/boost/test/impl/debug.ipp

index bee956c1cb..0e816fbd02 100644

--- a/boost/boost/test/impl/debug.ipp

+++ b/boost/boost/test/impl/debug.ipp

@@ -68,7 +68,7 @@ namespace std { using ::memset; using ::sprintf; }

 #  include <sys/stat.h>

 #  include <sys/wait.h>

 #  include <sys/time.h>

-#  include <stdio.h>

+#  include <cstdio>

 #  include <stdlib.h>

 #  if defined(sun) || defined(__sun)