diff --git a/ethcore/src/client/client.rs b/ethcore/src/client/client.rs
index 6857416d3..caa92db97 100644
--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@@ -317,7 +317,7 @@ impl<V> Client<V> where V: Verifier {
 		}
 
 		{
-			if !imported_blocks.is_empty() {
+			if !imported_blocks.is_empty() && self.block_queue.queue_info().is_empty() {
 				let (enacted, retracted) = self.calculate_enacted_retracted(import_results);
 				io.send(NetworkIoMessage::User(SyncMessage::NewChainBlocks {
 					imported: imported_blocks,