diff --git a/cmd/contacts/contacts.go b/cmd/contacts/contacts.go
index 3042ea8..a12252c 100644
--- a/cmd/contacts/contacts.go
+++ b/cmd/contacts/contacts.go
@@ -76,10 +76,10 @@ VALUES (
 	for c := range contactCh {
 		switch {
 		case !utf8.ValidString(c.name):
-			glog.Errorf("Invalid UTF-8 for name: %q", c.name)
+			glog.Errorf("%s Invalid UTF-8 for name: %q", c.hash, c.name)
 			continue
 		case !utf8.ValidString(c.addr):
-			glog.Errorf("Invalid UTF-8 for name: %q", c.addr)
+			glog.Errorf("%s Invalid UTF-8 for name: %q", c.hash, c.addr)
 			continue
 		}
 		glog.V(2).Infof("%d Exec %q %q %q", cnt, c.hash, c.name, c.addr)