diff --git a/winsup/cygwin/fhandler/pipe.cc b/winsup/cygwin/fhandler/pipe.cc
index 506dd09249..169c0bbf51 100644
--- a/winsup/cygwin/fhandler/pipe.cc
+++ b/winsup/cygwin/fhandler/pipe.cc
@@ -561,7 +561,7 @@ fhandler_pipe_fifo::raw_write (const void *ptr, size_t len)
       ULONG len1;
       DWORD waitret = WAIT_OBJECT_0;
 
-      if (left > chunk && !is_nonblocking ())
+      if (left > chunk && !real_non_blocking_mode)
 	len1 = chunk;
       else
 	len1 = (ULONG) left;