diff --git a/google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/Connection.java b/google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/Connection.java
index 7d87a5f17..069b2df74 100644
--- a/google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/Connection.java
+++ b/google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/Connection.java
@@ -17,6 +17,7 @@
 package com.google.cloud.bigquery;
 
 import com.google.api.services.bigquery.model.QueryParameter;
+import java.sql.ResultSet;
 import java.util.List;
 import java.util.Map;
 
@@ -46,7 +47,7 @@ public interface Connection {
    * @return a BigQueryResultSet that contains the data produced by the query
    * @exception BigQuerySQLException if a database access error occurs
    */
-  BigQueryResultSet executeSelect(String sql) throws BigQuerySQLException;
+  ResultSet executeSelect(String sql) throws BigQuerySQLException;
 
   /**
    * Execute a SQL statement with query parameters that returns a single BigQueryResultSet
@@ -64,7 +65,6 @@ public interface Connection {
    * @return a BigQueryResultSet that contains the data produced by the query
    * @exception BigQuerySQLException if a database access error occurs
    */
-  BigQueryResultSet executeSelect(
-      String sql, List<QueryParameter> parameters, Map<String, String> labels)
+  ResultSet executeSelect(String sql, List<QueryParameter> parameters, Map<String, String> labels)
       throws BigQuerySQLException;
 }