diff --git a/common/heap.go b/common/heap.go
index f3f55a1c0..b3bcb9db8 100644
--- a/common/heap.go
+++ b/common/heap.go
@@ -1,6 +1,7 @@
 package common
 
 import (
+	"bytes"
 	"container/heap"
 )
 
@@ -35,6 +36,10 @@ func (h *Heap) Push(value interface{}, priority int) {
 	heap.Push(&h.pq, &pqItem{value: value, priority: cmpInt(priority)})
 }
 
+func (h *Heap) PushBytes(value interface{}, priority []byte) {
+	heap.Push(&h.pq, &pqItem{value: value, priority: cmpBytes(priority)})
+}
+
 func (h *Heap) PushComparable(value interface{}, priority Comparable) {
 	heap.Push(&h.pq, &pqItem{value: value, priority: priority})
 }
@@ -112,3 +117,9 @@ type cmpInt int
 func (i cmpInt) Less(o interface{}) bool {
 	return int(i) < int(o.(cmpInt))
 }
+
+type cmpBytes []byte
+
+func (bz cmpBytes) Less(o interface{}) bool {
+	return bytes.Compare([]byte(bz), []byte(o.(cmpBytes))) < 0
+}