diff --git a/src/wp-includes/post.php b/src/wp-includes/post.php
index 39d71a37c8..8770b0dc4f 100644
--- a/src/wp-includes/post.php
+++ b/src/wp-includes/post.php
@@ -3706,7 +3706,7 @@ function get_pages( $args = array() ) {
 	if ( !in_array( $post_type, $hierarchical_post_types ) )
 		return $pages;
 
-	if ( $parent && ! $child_of )
+	if ( $parent > 0 && ! $child_of )
 		$hierarchical = false;
 
 	// Make sure we have a valid post status
diff --git a/tests/phpunit/tests/post.php b/tests/phpunit/tests/post.php
index 6e6e4094d6..f4da909c46 100644
--- a/tests/phpunit/tests/post.php
+++ b/tests/phpunit/tests/post.php
@@ -829,4 +829,34 @@ class Tests_Post extends WP_UnitTestCase {
 		$counts->publish = 7;
 		return $counts;
 	}
+
+	/**
+	 * @ticket 25750
+	 */
+	function test_get_pages_hierarchical_and_no_parent() {
+		global $wpdb;
+		$page_1 = $this->factory->post->create( array( 'post_type' => 'page' ) );
+		$page_2 = $this->factory->post->create( array( 'post_type' => 'page', 'post_parent' => $page_1 ) );
+		$page_3 = $this->factory->post->create( array( 'post_type' => 'page', 'post_parent' => $page_1 ) );
+		$page_4 = $this->factory->post->create( array( 'post_type' => 'page', 'post_parent' => $page_2 ) );
+
+		$pages = get_pages(); // Defaults: hierarchical = true, parent = -1
+		$pages_default_args = get_pages( array( 'hierarchical' => true, 'parent' => -1 ) );
+		// Confirm the defaults.
+		$this->assertEquals( $pages, $pages_default_args );
+
+		/*
+		 * Here's the tree we are testing:
+		 *
+		 * page 1
+		 * - page 2
+		 * -- page 4
+		 * - page 3
+		 *
+		 * If hierarchical => true works, the order will be 1,2,4,3.
+		 * If it doesn't, they will be in the creation order, 1,2,3,4.
+		 */
+
+		$this->assertEqualSets( array( $page_1, $page_2, $page_4, $page_3 ), wp_list_pluck( $pages, 'ID' ) );
+	}
 }