--- a/util-src/pposix.c	Sat Nov 16 16:45:33 2019 +0100
+++ b/util-src/pposix.c	Sat Nov 16 16:52:31 2019 +0100
@@ -25,14 +25,18 @@
 #define _DEFAULT_SOURCE
 #endif
 #endif
+
 #if defined(__APPLE__)
 #ifndef _DARWIN_C_SOURCE
 #define _DARWIN_C_SOURCE
 #endif
 #endif
+
+#if ! defined(__FreeBSD__)
 #ifndef _POSIX_C_SOURCE
 #define _POSIX_C_SOURCE 200809L
 #endif
+#endif
 
 #include <stdlib.h>
 #include <math.h>