diff --git a/include/h.h b/include/h.h
index 47489506a..2fe7cc1b9 100644
--- a/include/h.h
+++ b/include/h.h
@@ -1541,4 +1541,4 @@ extern OutgoingWebRequest *duplicate_outgoingwebrequest(OutgoingWebRequest *orig
 extern void url_callback(OutgoingWebRequest *r, const char *file, const char *memory, int memory_len, const char *errorbuf, int cached, void *ptr);
 extern const char *synchronous_http_request(const char *url, int max_redirects, int connect_timeout, int transfer_timeout);
 extern int update_known_user_cache(Client *client);
-extern SecurityGroup *known_users;
+extern MODVAR SecurityGroup *known_users;