--- /dev/null
+--- a/common.h
++++ b/common.h
+@@ -179,7 +179,7 @@ struct ip6_ext {
+
+ /* following lines are copy from unistd.h in Linux for avoidance warnings in compilation */
+ #if defined(HAVE_SETRESGID) && !defined(_GNU_SOURCE)
+-extern int setresgid (__uid_t __ruid, __uid_t __euid, __uid_t __suid);
++extern int setresgid (uid_t __ruid, uid_t __euid, uid_t __suid);
+ #endif
+ #if defined(HAVE_SETRESUID) && !defined(_GNU_SOURCE)
+ extern int setresuid (__uid_t __ruid, __uid_t __euid, __uid_t __suid);