diff --git a/billiard/process.py b/billiard/process.py
index 3f1c87c..5082343 100644
--- a/billiard/process.py
+++ b/billiard/process.py
@@ -144,7 +144,7 @@ def join(self, timeout=None):
         res = self._popen.wait(timeout)
         if res is not None:
             _children.discard(self)
-        self.close()
+            self.close()
 
     def is_alive(self):
         '''