diff --git a/rpc/api.go b/rpc/api.go
index 792498547..d00b86ac0 100644
--- a/rpc/api.go
+++ b/rpc/api.go
@@ -862,3 +862,36 @@ func toFilterOptions(options *FilterOptions) core.FilterOptions {
 
 	return opts
 }
+
+type whisperFilter struct {
+	messages []xeth.WhisperMessage
+	timeout  time.Time
+	id       int
+}
+
+func (w *whisperFilter) add(msgs ...xeth.WhisperMessage) {
+	w.messages = append(w.messages, msgs...)
+}
+func (w *whisperFilter) get() []xeth.WhisperMessage {
+	w.timeout = time.Now()
+	tmp := w.messages
+	w.messages = nil
+	return tmp
+}
+
+type logFilter struct {
+	logs    state.Logs
+	timeout time.Time
+	id      int
+}
+
+func (l *logFilter) add(logs ...state.Log) {
+	l.logs = append(l.logs, logs...)
+}
+
+func (l *logFilter) get() state.Logs {
+	l.timeout = time.Now()
+	tmp := l.logs
+	l.logs = nil
+	return tmp
+}
diff --git a/rpc/util.go b/rpc/util.go
deleted file mode 100644
index e2442b9fb..000000000
--- a/rpc/util.go
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
-	This file is part of go-ethereum
-
-	go-ethereum is free software: you can redistribute it and/or modify
-	it under the terms of the GNU General Public License as published by
-	the Free Software Foundation, either version 3 of the License, or
-	(at your option) any later version.
-
-	go-ethereum is distributed in the hope that it will be useful,
-	but WITHOUT ANY WARRANTY; without even the implied warranty of
-	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  GNU General Public License for more details.
-
-	You should have received a copy of the GNU General Public License
-	along with go-ethereum.  If not, see <http://www.gnu.org/licenses/>.
-*/
-package rpc
-
-import (
-	"time"
-
-	"github.com/ethereum/go-ethereum/state"
-	"github.com/ethereum/go-ethereum/xeth"
-)
-
-type whisperFilter struct {
-	messages []xeth.WhisperMessage
-	timeout  time.Time
-	id       int
-}
-
-func (w *whisperFilter) add(msgs ...xeth.WhisperMessage) {
-	w.messages = append(w.messages, msgs...)
-}
-func (w *whisperFilter) get() []xeth.WhisperMessage {
-	w.timeout = time.Now()
-	tmp := w.messages
-	w.messages = nil
-	return tmp
-}
-
-type logFilter struct {
-	logs    state.Logs
-	timeout time.Time
-	id      int
-}
-
-func (l *logFilter) add(logs ...state.Log) {
-	l.logs = append(l.logs, logs...)
-}
-
-func (l *logFilter) get() state.Logs {
-	l.timeout = time.Now()
-	tmp := l.logs
-	l.logs = nil
-	return tmp
-}