diff --git a/Modules/fcntlmodule.c b/Modules/fcntlmodule.c
index bfc5985..6b7e3fc 100644
--- a/Modules/fcntlmodule.c
+++ b/Modules/fcntlmodule.c
@@ -540,10 +540,13 @@
     if (ins(d, "F_SHLCK", (long)F_SHLCK)) return -1;
 #endif
 
-/* OS X (and maybe others) let you tell the storage device to flush to physical media */
+/* OS X specifics */
 #ifdef F_FULLFSYNC
     if (ins(d, "F_FULLFSYNC", (long)F_FULLFSYNC)) return -1;
 #endif
+#ifdef F_NOCACHE
+    if (ins(d, "F_NOCACHE", (long)F_NOCACHE)) return -1;
+#endif
 
 /* For F_{GET|SET}FL */
 #ifdef FD_CLOEXEC