diff --git a/setup.h.in b/setup.h.in
index b9ba86f943..b978ce3f6e 100644
--- a/setup.h.in
+++ b/setup.h.in
@@ -807,6 +807,9 @@
 /* Define if you have ftime() */
 #undef HAVE_FTIME
 
+/* Define if round() is available */
+#undef HAVE_ROUND
+
 /* Define if you have support for large (64 bit size) files */
 #undef HAVE_LARGEFILE_SUPPORT