diff --git a/blockchain/bl_pool.go b/blockchain/bl_pool.go
index b1e80080..ffea720a 100644
--- a/blockchain/bl_pool.go
+++ b/blockchain/bl_pool.go
@@ -88,8 +88,10 @@ func (bl *FxBlockchain) PoolJoin(ctx context.Context, to peer.ID, r PoolJoinRequ
 		if err != nil {
 			return b, err
 		}
-		bl.wg.Add(1)
-		go bl.a.AnnounceJoinPoolRequestPeriodically(ctx)
+		if bl.a != nil {
+			bl.wg.Add(1)
+			go bl.a.AnnounceJoinPoolRequestPeriodically(ctx)
+		}
 		return b, nil
 	}
 }
diff --git a/mobile/config.go b/mobile/config.go
index 0ccf40a4..c91fae10 100644
--- a/mobile/config.go
+++ b/mobile/config.go
@@ -171,7 +171,7 @@ func (cfg *Config) init(mc *Client) error {
 		if err != nil {
 			return err
 		}
-		mc.bl, err = blockchain.NewFxBlockchain(mc.h, nil,
+		mc.bl, err = blockchain.NewFxBlockchain(mc.h, nil, nil,
 			blockchain.NewSimpleKeyStorer(""),
 			blockchain.WithAuthorizer(mc.h.ID()),
 			blockchain.WithAllowTransientConnection(cfg.AllowTransientConnection),