diff --git a/include/gatekeeper/gatekeeper_messages.h b/include/gatekeeper/gatekeeper_messages.h
index ec33f18..59f419c 100644
--- a/include/gatekeeper/gatekeeper_messages.h
+++ b/include/gatekeeper/gatekeeper_messages.h
@@ -29,6 +29,8 @@
 
 const uint32_t ENROLL = 0;
 const uint32_t VERIFY = 1;
+const uint32_t DELETE_USER = 2;
+const uint32_t DELETE_ALL_USERS = 3;
 
 typedef enum {
     ERROR_NONE = 0,