diff --git a/Lib/test/test_long.py b/Lib/test/test_long.py
index b41d270..a20c3fc 100644
--- a/Lib/test/test_long.py
+++ b/Lib/test/test_long.py
@@ -681,7 +681,7 @@
         # behaviour near extremes of floating-point range
         long_dbl_max = long(DBL_MAX)
         top_power = 2**DBL_MAX_EXP
-        halfway = (long_dbl_max + top_power)/2
+        halfway = (long_dbl_max + top_power)//2
         self.assertEqual(float(long_dbl_max), DBL_MAX)
         self.assertEqual(float(long_dbl_max+1), DBL_MAX)
         self.assertEqual(float(halfway-1), DBL_MAX)