diff --git a/frame/base/bli_threading_pthreads.c b/frame/base/bli_threading_pthreads.c
index e22d2f7f3..e3f3f6387 100644
--- a/frame/base/bli_threading_pthreads.c
+++ b/frame/base/bli_threading_pthreads.c
@@ -36,7 +36,7 @@
 
 #ifdef BLIS_ENABLE_PTHREADS
 
-#ifndef _POSIX_BARRIERS
+#ifdef __APPLE__
 
 int pthread_barrier_init(pthread_barrier_t *barrier, const pthread_barrierattr_t *attr, unsigned int count)
 {
diff --git a/frame/base/bli_threading_pthreads.h b/frame/base/bli_threading_pthreads.h
index 91d12ae05..6bff44815 100644
--- a/frame/base/bli_threading_pthreads.h
+++ b/frame/base/bli_threading_pthreads.h
@@ -39,7 +39,7 @@
 
 #include <pthread.h>
 
-#if !_POSIX_BARRIER
+#ifdef __APPLE__
 typedef int pthread_barrierattr_t;
 
 struct pthread_barrier_s
@@ -55,7 +55,7 @@ typedef struct pthread_barrier_s pthread_barrier_t;
 int pthread_barrier_init(pthread_barrier_t *barrier, const pthread_barrierattr_t *attr, unsigned int count);
 int pthread_barrier_destroy(pthread_barrier_t *barrier);
 int pthread_barrier_wait(pthread_barrier_t *barrier);
-#endif // __APPLE__
+#endif
 
 struct thread_comm_s
 {