diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index 2aa02ae..363c827 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -541,7 +541,7 @@
         _cleanup()
 
         self._child_created = False
-        if not isinstance(bufsize, (int, int)):
+        if not isinstance(bufsize, int):
             raise TypeError("bufsize must be an integer")
 
         if mswindows: