diff --git a/kqueen/config/base.py b/kqueen/config/base.py
index bae98817..e424db9c 100644
--- a/kqueen/config/base.py
+++ b/kqueen/config/base.py
@@ -37,7 +37,7 @@ class BaseConfig:
     PROVISIONER_OK_STATE = 'OK'
     PROVISIONER_UNKNOWN_STATE = 'Not Reachable'
 
-    PROVISIONER_ENGINE_WHITELIST = []
+    PROVISIONER_ENGINE_WHITELIST = None
 
     PROMETHEUS_WHITELIST = '127.0.0.0/8'