diff --git a/internal/ethapi/backend.go b/internal/ethapi/backend.go
index 73b6c89cea..91a1b5806a 100644
--- a/internal/ethapi/backend.go
+++ b/internal/ethapi/backend.go
@@ -43,7 +43,6 @@ type Backend interface {
 	ProtocolVersion() int
 	SuggestPrice(ctx context.Context) (*big.Int, error)
 	ChainDb() ethdb.Database
-	EventMux() *event.TypeMux
 	AccountManager() *accounts.Manager
 	ExtRPCEnabled() bool
 	RPCGasCap() *big.Int // global gas cap for eth_call over rpc: DoS protection