pex.go | 2 +-

diff --git a/pex.go b/pex.go
index a808af2bc0f9bc6c3724b5d8c4663e03182d67e6..22834436b826dade3e0a830ca10fc7440745fddc 100644
--- a/pex.go
+++ b/pex.go
@@ -55,7 +55,7 @@ 	return a.IP.Equal(b.IP) && a.Port == b.Port
 }
 
 func addrIndex(v []krpc.NodeAddr, a *krpc.NodeAddr) int {
-	for i := range v {
+	for i := 0; i < len(v); i += 1 {
 		if addrEqual(&v[i], a) {
 			return i
 		}