diff --git a/axelrod/strategies/__init__.py b/axelrod/strategies/__init__.py
index 48163df61..54b154c74 100644
--- a/axelrod/strategies/__init__.py
+++ b/axelrod/strategies/__init__.py
@@ -46,8 +46,8 @@
 
 long_run_time_strategies = [s for s in all_strategies if
                             s().classifier['long_run_time']]
-short_run_time_strategies = [s for s in strategies
-                             if s not in long_run_time_strategies]
+short_run_time_strategies = [s for s in strategies if not
+                             s().classifier['long_run_time']]
 cheating_strategies = [s for s in all_strategies if not obey_axelrod(s())]
 
 ordinary_strategies = strategies  # This is a legacy and will be removed