diff --git a/src/fileio.c b/src/fileio.c
index 841de1c..ab2c3fd 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -5135,7 +5135,7 @@
 
 # ifdef MACOS_X
     r = fcntl(fd, F_FULLFSYNC);
-    if (r != 0 && errno == ENOTTY)
+    if (r != 0 && (errno == ENOTTY || errno == ENOTSUP))
 # endif
 	r = fsync(fd);
     return r;