--- file_not_specified_in_diff	
+++ file_not_specified_in_diff	
@@ -, +, @@ 
--- a/src/withsctp/checksctp.c
+++ b/src/withsctp/checksctp.c
@@ -30,6 +30,7 @@ 
  */
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 #include <sys/socket.h>
 #include <netinet/in.h>