diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc
index ded12cc44..22dbdb05d 100644
--- a/winsup/cygwin/fhandler.cc
+++ b/winsup/cygwin/fhandler.cc
@@ -1875,6 +1875,7 @@ fhandler_base::fpathconf (int v)
       set_errno (EINVAL);
       break;
     case _PC_ASYNC_IO:
+      return 1;
     case _PC_PRIO_IO:
       break;
     case _PC_SYNC_IO: