diff --git a/setup.h.in b/setup.h.in
index daff8f50b8..9e049dda02 100644
--- a/setup.h.in
+++ b/setup.h.in
@@ -807,6 +807,9 @@
 /* Define if fsync() is available */
 #undef HAVE_FSYNC
 
+/* Define if round() is available */
+#undef HAVE_ROUND
+
 /* Define if you have ftime() */
 #undef HAVE_FTIME