diff --git a/src/daemon/rpmostreed-daemon.c b/src/daemon/rpmostreed-daemon.c
index bedb7728..01752c3b 100644
--- a/src/daemon/rpmostreed-daemon.c
+++ b/src/daemon/rpmostreed-daemon.c
@@ -180,8 +180,10 @@ on_active_txn_changed (GObject *object,
       g_variant_get (active_txn, "(&s&s&s)", &method, &sender, &path);
       if (*method)
         {
+          gboolean is_registered = rpmostreed_daemon_has_client (self, sender);
+          const char *caller_str = is_registered ? "client" : "caller";
           sd_journal_send ("MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(RPMOSTREE_MESSAGE_TRANSACTION_STARTED),
-                           "MESSAGE=Initiated txn %s for caller %s: %s", method, sender, path,
+                           "MESSAGE=Initiated txn %s for %s %s: %s", method, caller_str, sender, path,
                            NULL);
         }
     }
@@ -371,6 +373,13 @@ rpmostreed_daemon_add_client (RpmostreedDaemon *self,
   render_systemd_status (self);
 }
 
+/* Return `TRUE` if the bus address @client called RegisterClient. */
+gboolean
+rpmostreed_daemon_has_client (RpmostreedDaemon *self, const char *client)
+{
+  return g_hash_table_contains (self->bus_clients, client);
+}
+
 void
 rpmostreed_daemon_remove_client (RpmostreedDaemon *self,
                                  const char       *client)
diff --git a/src/daemon/rpmostreed-daemon.h b/src/daemon/rpmostreed-daemon.h
index f1126d6a..798fd33e 100644
--- a/src/daemon/rpmostreed-daemon.h
+++ b/src/daemon/rpmostreed-daemon.h
@@ -31,6 +31,7 @@ GType              rpmostreed_daemon_get_type       (void) G_GNUC_CONST;
 RpmostreedDaemon * rpmostreed_daemon_get            (void);
 void               rpmostreed_daemon_add_client     (RpmostreedDaemon *self, const char *client);
 void               rpmostreed_daemon_remove_client  (RpmostreedDaemon *self, const char *client);
+gboolean           rpmostreed_daemon_has_client     (RpmostreedDaemon *self, const char *client);
 void               rpmostreed_daemon_exit_now       (RpmostreedDaemon *self);
 void               rpmostreed_daemon_run_until_idle_exit (RpmostreedDaemon *self);
 void               rpmostreed_daemon_publish        (RpmostreedDaemon *self,