diff --git a/rsa/_compat.py b/rsa/_compat.py
index 93393d9..9d1d99d 100644
--- a/rsa/_compat.py
+++ b/rsa/_compat.py
@@ -21,11 +21,7 @@
 import sys
 from struct import pack
 
-try:
-    MAX_INT = sys.maxsize
-except AttributeError:
-    MAX_INT = sys.maxint
-
+MAX_INT = sys.maxsize
 MAX_INT64 = (1 << 63) - 1
 MAX_INT32 = (1 << 31) - 1
 MAX_INT16 = (1 << 15) - 1