options.h needs to include sys/time.h for struct timeval tv
diff --git a/options.h b/options.h
index e1cc823..4533471 100644
--- a/options.h
+++ b/options.h
@@ -23,6 +23,7 @@
 
 #include <stdio.h>
 #include <sys/types.h>
+#include <sys/time.h>
 
 #include "forward.h"