diff --git a/os/utils.c b/os/utils.c
index 65e131166..9824501e7 100644
--- a/os/utils.c
+++ b/os/utils.c
@@ -55,11 +55,13 @@ OR PERFORMANCE OF THIS SOFTWARE.
 
 /* The world's most shocking hack, to ensure we get clock_gettime() and
  * CLOCK_MONOTONIC. */
+#ifdef sun              /* Needed to tell Solaris headers not to restrict to */
+#define __EXTENSIONS__  /* only the functions defined in POSIX 199309.       */
+#endif
+
 #ifdef _POSIX_C_SOURCE
 #define _SAVED_POSIX_C_SOURCE _POSIX_C_SOURCE
 #undef _POSIX_C_SOURCE
-#else if defined(sun)	/* Needed to tell Solaris headers not to restrict to */
-#define __EXTENSIONS__	/* only the functions defined in POSIX 199309.       */
 #endif
 #define _POSIX_C_SOURCE 199309L
 #include <time.h>