diff --git a/weed/shell/command_ec_encode.go b/weed/shell/command_ec_encode.go
index 923910706..072a95a2c 100644
--- a/weed/shell/command_ec_encode.go
+++ b/weed/shell/command_ec_encode.go
@@ -324,7 +324,7 @@ func collectVolumeIdsForEcEncode(commandEnv *CommandEnv, selectedCollection stri
 							}
 						} else {
 							if diskInfo.FreeVolumeCount < 2 {
-								glog.V(0).Infof("skip %d %d on %s, no free disk", v.Collection, v.Id, dn.Id)
+								glog.V(0).Infof("skip %s %d on %s, no free disk", v.Collection, v.Id, dn.Id)
 								vidMap[v.Id] = false
 							} else {
 								vidMap[v.Id] = true