diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index 3cd0df5..19fe847 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -872,7 +872,7 @@
             # object do the translation: It is based on stdio, which is
             # impossible to combine with select (unless forcing no
             # buffering).
-            if self.universal_newlines and hasattr(open, 'newlines'):
+            if self.universal_newlines and hasattr(file, 'newlines'):
                 if stdout:
                     stdout = self._translate_newlines(stdout)
                 if stderr:
@@ -1141,7 +1141,7 @@
             # object do the translation: It is based on stdio, which is
             # impossible to combine with select (unless forcing no
             # buffering).
-            if self.universal_newlines and hasattr(open, 'newlines'):
+            if self.universal_newlines and hasattr(file, 'newlines'):
                 if stdout:
                     stdout = self._translate_newlines(stdout)
                 if stderr: