diff --git a/sublist3r.py b/sublist3r.py
index 790e1c5..58d7e4d 100644
--- a/sublist3r.py
+++ b/sublist3r.py
@@ -937,7 +937,7 @@ def main(domain, threads, savefile, ports, silent, verbose, enable_bruteforce, e
     else:
         engines = engines.split(',')
         for engine in engines:
-            if supported_engines.has_key(engine.lower()):
+            if engine.lower() in supported_engines:
                 chosenEnums.append(supported_engines[engine.lower()])
 
     #Start the engines enumeration