diff --git a/raft/log.go b/raft/log.go
index a3bf9a3d3..ccd6122d0 100644
--- a/raft/log.go
+++ b/raft/log.go
@@ -83,7 +83,7 @@ func (l *raftLog) maybeAppend(index, logTerm, committed uint64, ents ...pb.Entry
 		switch {
 		case ci == 0:
 		case ci <= l.committed:
-			log.Panicf("conflict(%d) with committed entry [committed(%d)]", ci, l.committed)
+			log.Panicf("entry %d conflict with committed entry [committed(%d)]", ci, l.committed)
 		default:
 			l.append(ci-1, ents[ci-from:]...)
 		}
@@ -95,7 +95,7 @@ func (l *raftLog) maybeAppend(index, logTerm, committed uint64, ents ...pb.Entry
 
 func (l *raftLog) append(after uint64, ents ...pb.Entry) uint64 {
 	if after < l.committed {
-		log.Panicf("after(%d) out of range [committed(%d)]", after, l.committed)
+		log.Panicf("after(%d) is out of range [committed(%d)]", after, l.committed)
 	}
 	if after < l.unstable {
 		// The log is being truncated to before our current unstable
@@ -289,17 +289,3 @@ func (l *raftLog) isOutOfBounds(i uint64) bool {
 	}
 	return false
 }
-
-func min(a, b uint64) uint64 {
-	if a > b {
-		return b
-	}
-	return a
-}
-
-func max(a, b uint64) uint64 {
-	if a > b {
-		return a
-	}
-	return b
-}
diff --git a/raft/raft.go b/raft/raft.go
index 3597b74fe..f64e14b60 100644
--- a/raft/raft.go
+++ b/raft/raft.go
@@ -100,13 +100,6 @@ func (pr *progress) String() string {
 	return fmt.Sprintf("n=%d m=%d", pr.next, pr.match)
 }
 
-// uint64Slice implements sort interface
-type uint64Slice []uint64
-
-func (p uint64Slice) Len() int           { return len(p) }
-func (p uint64Slice) Less(i, j int) bool { return p[i] < p[j] }
-func (p uint64Slice) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
-
 type raft struct {
 	pb.HardState
 
@@ -452,9 +445,7 @@ func (r *raft) handleSnapshot(m pb.Message) {
 	}
 }
 
-func (r *raft) resetPendingConf() {
-	r.pendingConf = false
-}
+func (r *raft) resetPendingConf() { r.pendingConf = false }
 
 func (r *raft) addNode(id uint64) {
 	r.setProgress(id, 0, r.raftLog.lastIndex()+1)
diff --git a/raft/storage.go b/raft/storage.go
index 4d7bd7842..14d3fa3ec 100644
--- a/raft/storage.go
+++ b/raft/storage.go
@@ -158,7 +158,7 @@ func (ms *MemoryStorage) Compact(i uint64, cs *pb.ConfState, data []byte) error
 		return ErrCompacted
 	}
 	if i > offset+uint64(len(ms.ents))-1 {
-		log.Panicf("compact %d out of bound lastindex(%d)", i, offset+uint64(len(ms.ents))-1)
+		log.Panicf("compact %d is out of bound lastindex(%d)", i, offset+uint64(len(ms.ents))-1)
 	}
 	i -= offset
 	ents := make([]pb.Entry, 1, 1+uint64(len(ms.ents))-i)
diff --git a/raft/util.go b/raft/util.go
index d97707796..95af25f3a 100644
--- a/raft/util.go
+++ b/raft/util.go
@@ -23,6 +23,27 @@ import (
 	pb "github.com/coreos/etcd/raft/raftpb"
 )
 
+// uint64Slice implements sort interface
+type uint64Slice []uint64
+
+func (p uint64Slice) Len() int           { return len(p) }
+func (p uint64Slice) Less(i, j int) bool { return p[i] < p[j] }
+func (p uint64Slice) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
+
+func min(a, b uint64) uint64 {
+	if a > b {
+		return b
+	}
+	return a
+}
+
+func max(a, b uint64) uint64 {
+	if a > b {
+		return a
+	}
+	return b
+}
+
 // DescribeMessage returns a concise human-readable description of a
 // Message for debugging.
 func DescribeMessage(m pb.Message) string {