diff --git a/scheme/last-revision b/scheme/last-revision
index 408571c..a1efcad 100644
--- a/scheme/last-revision
+++ b/scheme/last-revision
@@ -1 +1 @@
-1703
+1704
diff --git a/src/ikarus-flonums.c b/src/ikarus-flonums.c
index 4851f89..3cc982d 100644
--- a/src/ikarus-flonums.c
+++ b/src/ikarus-flonums.c
@@ -17,6 +17,7 @@
 
 
 
+#define _ISOC99_SOURCE
 #include "ikarus-data.h"
 #include <stdlib.h>
 #include <string.h>