diff --git a/resolver/dns/dns_resolver.go b/resolver/dns/dns_resolver.go
index 5992bfbd4..bf597155f 100644
--- a/resolver/dns/dns_resolver.go
+++ b/resolver/dns/dns_resolver.go
@@ -233,7 +233,7 @@ func (d *dnsResolver) lookupTXT() string {
 
 	// TXT record must have "grpc_config=" attribute in order to be used as service config.
 	if !strings.HasPrefix(res, txtAttribute) {
-		grpclog.Warningf("grpc: TXT record %p missing %p attribute", res, txtAttribute)
+		grpclog.Warningf("grpc: TXT record %v missing %v attribute", res, txtAttribute)
 		return ""
 	}
 	return strings.TrimPrefix(res, txtAttribute)