1 files changed, 3 insertions, 1 deletions
diff --git a/Lib/multiprocessing/util.py b/Lib/multiprocessing/util.py
index abbc4c5e608..790955e7b71 100644
--- a/Lib/multiprocessing/util.py
+++ b/Lib/multiprocessing/util.py
@@ -446,13 +446,15 @@ def _flush_std_streams():
 
 def spawnv_passfds(path, args, passfds):
     import _posixsubprocess
+    import subprocess
     passfds = tuple(sorted(map(int, passfds)))
     errpipe_read, errpipe_write = os.pipe()
     try:
         return _posixsubprocess.fork_exec(
             args, [path], True, passfds, None, None,
             -1, -1, -1, -1, -1, -1, errpipe_read, errpipe_write,
-            False, False, None, None, None, -1, None)
+            False, False, None, None, None, -1, None,
+            subprocess._USE_VFORK)
     finally:
         os.close(errpipe_read)
         os.close(errpipe_write)