diff --git a/nsjail.h b/nsjail.h
index dcb327c..1b2ba9f 100644
--- a/nsjail.h
+++ b/nsjail.h
@@ -23,17 +23,6 @@
 #ifndef NS_NSJAIL_H
 #define NS_NSJAIL_H
 
-//taken from https://github.com/openhome/ohNet/issues/25
-#define _GNU_SOURCE 1
-#if defined(PLATFORM_MACOSX_GNU) || defined(PLATFORM_FREEBSD) || !defined(__GLIBC__)
-#define TEMP_FAILURE_RETRY(expression) \
-  (__extension__                                                              \
-    ({ long int __result;                                                     \
-       do __result = (long int) (expression);                                 \
-       while (__result == -1L && errno == EINTR);                             \
-       __result; }))
-#endif
-
 #include <netinet/ip6.h>
 #include <signal.h>
 #include <stdbool.h>
@@ -41,6 +30,18 @@
 #include <stdio.h>
 #include <sys/queue.h>
 #include <time.h>
+#include <unistd.h>
+
+#if !defined(TEMP_FAILURE_RETRY)
+#define TEMP_FAILURE_RETRY(expression)                     \
+	(__extension__({                                   \
+		long int __result;                         \
+		do                                         \
+			__result = (long int)(expression); \
+		while (__result == -1L && errno == EINTR); \
+		__result;                                  \
+	}))
+#endif /* !defined(TEMP_FAILURE_RETRY) */
 
 static const int nssigs[] = {
     SIGINT,