diff --git a/src/neogb/sort_r.h b/src/neogb/sort_r.h
index 596d3f65..35c6cc3b 100644
--- a/src/neogb/sort_r.h
+++ b/src/neogb/sort_r.h
@@ -44,7 +44,7 @@ void sort_r(void *base, size_t nel, size_t width,
 
 #define _SORT_R_INLINE inline
 
-#if (defined __APPLE__ || defined __MACH__ || defined __DARWIN__ || \
+#if (defined __APPLE__ || \
      (defined __FreeBSD__ && !defined(qsort_r)) || defined __DragonFly__)
 #  define _SORT_R_BSD
 #elif (defined __GLIBC__ || (defined (__FreeBSD__) && defined(qsort_r)))