diff --git a/src/AbstractQuery.php b/src/AbstractQuery.php
index f404b95..a229ca9 100644
--- a/src/AbstractQuery.php
+++ b/src/AbstractQuery.php
@@ -8,7 +8,7 @@
  */
 namespace Aura\SqlQuery;
 
-use Aura\SqlQuery\Common\SubselectInterface;
+use Aura\SqlQuery\Common\SelectInterface;
 use Aura\SqlQuery\Common\QuoterInterface;
 
 /**
@@ -350,7 +350,7 @@ protected function rebuildCondAndBindValues($cond, array $bind_values)
             }
 
             $bind_value = array_shift($bind_values);
-            if ($bind_value instanceof SubselectInterface) {
+            if ($bind_value instanceof SelectInterface) {
                 $parts[$key] = $bind_value->getStatement();
                 $this->bind_values = array_merge(
                     $this->bind_values,
diff --git a/src/Common/Select.php b/src/Common/Select.php
index 4734f36..2341bc9 100644
--- a/src/Common/Select.php
+++ b/src/Common/Select.php
@@ -18,7 +18,7 @@
  * @package Aura.SqlQuery
  *
  */
-class Select extends AbstractQuery implements SelectInterface, SubselectInterface
+class Select extends AbstractQuery implements SelectInterface
 {
     use WhereTrait;
     use LimitOffsetTrait { limit as setLimit; offset as setOffset; }
diff --git a/src/Common/SubselectInterface.php b/src/Common/SubselectInterface.php
deleted file mode 100644
index e12ec0f..0000000
--- a/src/Common/SubselectInterface.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-/**
- *
- * This file is part of Aura for PHP.
- *
- * @license http://opensource.org/licenses/bsd-license.php BSD
- *
- */
-namespace Aura\SqlQuery\Common;
-
-/**
- *
- * Interface to get a statement string so we can bind sub-select values.
- *
- * @package Aura.SqlQuery
- *
- * @see AbstractQuery::rebuildCondAndBindValues()
- *
- */
-interface SubselectInterface
-{
-    /**
-     *
-     * Returns this query object as an SQL statement string.
-     *
-     * @return string
-     *
-     */
-    public function getStatement();
-
-    /**
-     *
-     * Gets the values to bind to placeholders.
-     *
-     * @return array
-     *
-     */
-    public function getBindValues();
-}