--- /dev/null
+// commit: d8e8f1464cb02d6a62f01c7153ca4d7b0cd5c5e6 2013-11-11
+// iswspace(0) should be 0
+#include <wctype.h>
+#include "test.h"
+
+int main(void)
+{
+ if (iswspace(0)!=0)
+ t_error("iswspace(0) returned non-zero\n");
+ return t_status;
+}