diff --git a/accounts/abi/bind/backends/simulated.go b/accounts/abi/bind/backends/simulated.go
index 990cee9d77..017dceda06 100644
--- a/accounts/abi/bind/backends/simulated.go
+++ b/accounts/abi/bind/backends/simulated.go
@@ -346,7 +346,7 @@ func (b *SimulatedBackend) FilterLogs(ctx context.Context, query ethereum.Filter
 	var filter *filters.Filter
 	if query.BlockHash != nil {
 		// Block filter requested, construct a single-shot filter
-		filter = filters.NewBlockFilter(&filterBackend{b.database, b.blockchain}, *query.BlockHash, query.Addresses, query.Topics)
+		filter = filters.NewBlockFilter(&filterBackend{b.database, b.blockchain, nil}, *query.BlockHash, query.Addresses, query.Topics)
 	} else {
 		// Initialize unset filter boundaried to run from genesis to chain head
 		from := int64(0)
diff --git a/eth/api_backend.go b/eth/api_backend.go
index 7935f5ffe1..2acc309941 100644
--- a/eth/api_backend.go
+++ b/eth/api_backend.go
@@ -225,6 +225,6 @@ func (b *EthAPIBackend) ServiceFilter(ctx context.Context, session *bloombits.Ma
 	}
 }
 
-func (b *EthApiBackend) FilterTaskChannel() chan *filters.BlockFilterTask {
+func (b *EthAPIBackend) FilterTaskChannel() chan *filters.BlockFilterTask {
 	return b.eth.filterTasks
 }
diff --git a/eth/filters/filter.go b/eth/filters/filter.go
index 33471bff3a..d250e45bbe 100644
--- a/eth/filters/filter.go
+++ b/eth/filters/filter.go
@@ -316,7 +316,6 @@ func (f *Filter) unindexedLogs(ctx context.Context, tasks chan *BlockFilterTask,
 		case <-ctx.Done():
 			return ctx.Err()
 		}
-		logs = append(logs, found...)
 	}
 	return nil
 }
diff --git a/eth/filters/filter_system_test.go b/eth/filters/filter_system_test.go
index f9652ee2c3..60df14a4dc 100644
--- a/eth/filters/filter_system_test.go
+++ b/eth/filters/filter_system_test.go
@@ -368,7 +368,7 @@ func TestInvalidGetLogsRequest(t *testing.T) {
 		rmLogsFeed = new(event.Feed)
 		logsFeed   = new(event.Feed)
 		chainFeed  = new(event.Feed)
-		backend    = &testBackend{mux, db, 0, txFeed, rmLogsFeed, logsFeed, chainFeed}
+		backend    = &testBackend{mux, db, 0, txFeed, rmLogsFeed, logsFeed, chainFeed, nil}
 		api        = NewPublicFilterAPI(backend, false)
 		blockHash  = common.HexToHash("0x1111111111111111111111111111111111111111111111111111111111111111")
 	)