diff --git a/reference/configuration/security.rst b/reference/configuration/security.rst
index 13be9393268..9a12c168061 100644
--- a/reference/configuration/security.rst
+++ b/reference/configuration/security.rst
@@ -27,6 +27,7 @@ Each part will be explained in the next section.
             always_authenticate_before_granting:  false
             erase_credentials:    true
             access_decision_manager:
+                # strategy can be: affirmative, consensus, unanimous
                 strategy:             affirmative
                 allow_if_all_abstain:  false
                 allow_if_equal_granted_denied:  true