diff --git a/includes/class-solrpower-wp-query.php b/includes/class-solrpower-wp-query.php
index 147e07ce..779206cf 100644
--- a/includes/class-solrpower-wp-query.php
+++ b/includes/class-solrpower-wp-query.php
@@ -212,6 +212,9 @@ function posts_request( $request, $query ) {
 		) );
 
 		$posts = $this->parse_results( $search );
+		if ( 'ID' === $fields ) {
+			$posts = array_map( 'intval', wp_list_pluck( $posts, 'ID' ) );
+		}
 
 		$this->found_posts[ spl_object_hash( $query ) ] = $posts;
 		$this->reset_vars();
diff --git a/tests/phpunit/wp_query/test-wp-query.php b/tests/phpunit/wp_query/test-wp-query.php
index fbdf48d7..d7aa55ae 100644
--- a/tests/phpunit/wp_query/test-wp-query.php
+++ b/tests/phpunit/wp_query/test-wp-query.php
@@ -174,4 +174,22 @@ public function test_wp_query_search_filter_post_type() {
 		$this->assertEquals( 'page', $query->get('post_type') );
 		$this->assertEquals( array( $page_id ), wp_list_pluck( $query->posts, 'ID' ) );
 	}
+
+	public function test_wp_query_fields_ids() {
+		$p1 = self::factory()->post->create();
+		$p2 = self::factory()->post->create();
+		$p3 = self::factory()->post->create();
+
+		SolrPower_Sync::get_instance()->load_all_posts( 0, 'post', 100, false );
+		$query = new WP_Query( array(
+			'solr_integrate'         => true,
+			'update_post_meta_cache' => false,
+			'update_post_term_cache' => false,
+			'fields'                 => 'ids',
+			'orderby'                => 'ID',
+			'order'                  => 'ASC',
+		) );
+		$this->assertEquals( array( $p1, $p2, $p3 ), $query->posts );
+	}
+
 }