diff --git a/codepy/toolchain.py b/codepy/toolchain.py
index cec6ad64e04c029f6919442c01b2c4d70f6343cd..5e72433438ff6c64771397c04b0bbda181d5fe6b 100644
--- a/codepy/toolchain.py
+++ b/codepy/toolchain.py
@@ -450,7 +450,7 @@ def guess_toolchain():
             # So we need to check explicitly how we're running
             # And update the cflags accordingly
             import sys
-            if sys.maxint == 0x7fffffff:
+            if sys.maxsize == 0x7fffffff:
                 kwargs["cflags"].extend(['-arch', 'i386'])
 
         return GCCToolchain(**kwargs)
@@ -463,7 +463,7 @@ def guess_toolchain():
             # So we need to check explicitly how we're running
             # And update the cflags accordingly
             import sys
-            if sys.maxint == 0x7fffffff:
+            if sys.maxsize == 0x7fffffff:
                 kwargs["cflags"].extend(['-arch', 'i386'])
 
         return GCCToolchain(**kwargs)