diff --git a/src/libsodium/include/sodium/private/common.h b/src/libsodium/include/sodium/private/common.h
index bb292e4e..e1417c59 100644
--- a/src/libsodium/include/sodium/private/common.h
+++ b/src/libsodium/include/sodium/private/common.h
@@ -258,8 +258,10 @@ extern void ct_unpoison(const void *, size_t);
 # define UNPOISON(X, L) (void) 0
 #endif
 
-#ifdef __ATOMIC_ACQUIRE
+#ifdef HAVE_GCC_MEMORY_FENCES
 # define ACQUIRE_FENCE __atomic_thread_fence(__ATOMIC_ACQUIRE)
+#elif defined(HAVE_C11_MEMORY_FENCES)
+# define ACQUIRE_FENCE atomic_thread_fence(memory_order_acquire)
 #else
 # define ACQUIRE_FENCE (void) 0
 #endif