diff --git a/block/file-posix.c b/block/file-posix.c
index f16d987c07..74b8216077 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -2341,7 +2341,7 @@ again:
             }
         }
 #endif
-#if defined(__APPLE__) && defined(__MACH__)
+#if defined(DKIOCGETBLOCKCOUNT) && defined(DKIOCGETBLOCKSIZE)
         if (size == 0) {
             uint64_t sectors = 0;
             uint32_t sector_size = 0;