diff --git a/cpu/native/tapsetup-freebsd.sh b/cpu/native/tapsetup-freebsd.sh
old mode 100644
new mode 100755
diff --git a/sys/posix/include/unistd.h b/sys/posix/include/unistd.h
index 9e0d385496..85f8d663b1 100644
--- a/sys/posix/include/unistd.h
+++ b/sys/posix/include/unistd.h
@@ -52,13 +52,15 @@
 int close(int fildes);
 
 #ifndef __USECONDS_T_TYPE
-#ifndef __MACH__
+#if !(defined(__MACH__) || defined(__FreeBSD__))
 typedef unsigned long __USECONDS_T_TYPE;
 typedef __USECONDS_T_TYPE __useconds_t;
 #else
+#ifdef __MACH__
 typedef __darwin_useconds_t __useconds_t;
 #endif
 #endif
+#endif
 typedef __useconds_t useconds_t;
 
 /**