diff --git a/src/security/security-common.hpp b/src/security/security-common.hpp
index 9ce4599..1bea763 100644
--- a/src/security/security-common.hpp
+++ b/src/security/security-common.hpp
@@ -38,6 +38,11 @@
   // ENCRYPT_MODE_CBC_AES
 };
 
+enum AclType {
+  ACL_TYPE_PUBLIC,
+  ACL_TYPE_PRIVATE,
+};
+
 }
 
 #endif