diff --git a/src/server/node.rs b/src/server/node.rs
index 4e0a9cf3d25..05a1b36ae99 100644
--- a/src/server/node.rs
+++ b/src/server/node.rs
@@ -169,7 +169,8 @@ impl<C> Node<C>
 
         let ident = res.unwrap();
         if ident.get_cluster_id() != self.cluster_id {
-            error!("cluster ID mismatch: local_id {} remote_id {}",
+            error!("cluster ID mismatch: local_id {} remote_id {}. \
+            you are trying to connect to another cluster, please reconnect to the correct PD",
                    ident.get_cluster_id(),
                    self.cluster_id);
             process::exit(1);