diff --git a/googleApps.ml b/googleApps.ml
index b3e5e16..922baa4 100644
--- a/googleApps.ml
+++ b/googleApps.ml
@@ -146,6 +146,7 @@ include ([%js] : sig
              val get_body : t -> string [@@js.call]
              val get_subject : t -> string [@@js.call]
              val get_from : t -> string [@@js.call]
+             val get_id : t -> string [@@js.call]
            end
 
            module GmailThread : sig
diff --git a/googleApps.mli b/googleApps.mli
index 2f7d2d6..06f579c 100644
--- a/googleApps.mli
+++ b/googleApps.mli
@@ -191,6 +191,7 @@ sig
   val get_body : t -> string
   val get_subject : t -> string
   val get_from : t -> string
+  val get_id : t -> string
 end
 
 module GmailThread :