diff --git a/portal/includes/functions.php b/portal/includes/functions.php
index 8c623e44..8895c5d7 100644
--- a/portal/includes/functions.php
+++ b/portal/includes/functions.php
@@ -813,18 +813,17 @@ function check_file_src($value, $key, $module_id, $force_error = true)
 	$error = '';
 
 	// We check if the chosen file is present in all active styles
-	$sql = 'SELECT st.theme_path
-			FROM ' . STYLES_THEME_TABLE . ' st
-				LEFT JOIN ' . STYLES_TABLE . ' s
-					ON (st.theme_id = s.style_id)
-			WHERE s.style_active = 1';
+	$sql = 'SELECT style_path
+			FROM ' . STYLES_TABLE . '
+			WHERE style_active = 1';
 
 	$result = $db->sql_query($sql);
 	while ($row = $db->sql_fetchrow($result))
 	{
-		if (!file_exists($phpbb_root_path . 'styles/' . $row['theme_path'] . '/theme/images/portal/' . $value))
+		if (!file_exists($phpbb_root_path . 'styles/' . $row['style_path'] . '/theme/images/portal/' . $value) &&
+			!file_exists($phpbb_root_path . 'ext/board3/portal/styles/' . $row['style_path'] . '/theme/images/portal/' . $value))
 		{
-			$error .= $user->lang['B3P_FILE_NOT_FOUND'] . ': styles/' . $row['theme_path'] . '/theme/images/portal/' . $value . '<br />';
+			$error .= $user->lang['B3P_FILE_NOT_FOUND'] . ': styles/' . $row['style_path'] . '/theme/images/portal/' . $value . '<br />';
 		}
 	}
 	$db->sql_freeresult($result);
@@ -833,7 +832,7 @@ function check_file_src($value, $key, $module_id, $force_error = true)
 	{
 		if ($force_error)
 		{
-			trigger_error($error . adm_back_link(append_sid("{$phpbb_root_path}adm/index.$phpEx", 'i=portal&amp;mode=config&amp;module_id=' . $module_id)), E_USER_WARNING );
+			trigger_error($error . adm_back_link(append_sid("{$phpbb_root_path}adm/index.$phpEx", 'i=\board3\portal\acp\portal_module&amp;mode=config&amp;module_id=' . $module_id)), E_USER_WARNING);
 		}
 		else
 		{
diff --git a/tests/functions/check_file_src_test.php b/tests/functions/check_file_src_test.php
new file mode 100644
index 00000000..b122ca78
--- /dev/null
+++ b/tests/functions/check_file_src_test.php
@@ -0,0 +1,41 @@
+<?php
+/**
+*
+* @package testing
+* @copyright (c) Board3 Group ( www.board3.de )
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+require_once(dirname(__FILE__) . '/../../portal/includes/functions.php');
+require_once(dirname(__FILE__) . '/../../../../../includes/functions_acp.php');
+
+class phpbb_functions_check_file_src_test extends \board3\portal\tests\testframework\database_test_case
+{
+	public function setUp()
+	{
+		parent::setUp();
+		global $db, $phpbb_root_path, $phpEx, $user;
+		$user = new phpbb_mock_user();
+	}
+
+	public function getDataSet()
+	{
+		return $this->createXMLDataSet(dirname(__FILE__) . '/fixtures/styles.xml');
+	}
+
+	public function test_check_file_src()
+	{
+		$this->assertFalse(check_file_src('portal_attach.png', '', 15, false));
+		$this->assertEquals(': styles/prosilver/theme/images/portal/portal_foobar.png<br />', check_file_src('portal_foobar.png', '', 15, false));
+	}
+
+	public function test_check_file_src_error()
+	{
+		global $phpbb_dispatcher;
+
+		$phpbb_dispatcher = new phpbb_mock_event_dispatcher;
+		$this->setExpectedTriggerError(E_USER_WARNING);
+		$this->assertEquals(': styles/prosilver/theme/images/portal/portal_foobar.png<br />', check_file_src('portal_foobar.png', '', 15));
+	}
+}
diff --git a/tests/functions/fixtures/styles.xml b/tests/functions/fixtures/styles.xml
new file mode 100644
index 00000000..6cb30627
--- /dev/null
+++ b/tests/functions/fixtures/styles.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<dataset>
+	<table name="phpbb_styles">
+		<column>style_path</column>
+		<column>style_name</column>
+		<column>style_active</column>
+		<column>style_parent_tree</column>
+		<row>
+			<value>subsilver2</value>
+			<value>subsilver2</value>
+			<value>0</value>
+			<value></value>
+		</row>
+		<row>
+			<value>prosilver</value>
+			<value>prosilver</value>
+			<value>1</value>
+			<value></value>
+		</row>
+	</table>
+</dataset>
diff --git a/tests/testframework/test_case_helpers.php b/tests/testframework/test_case_helpers.php
index 27c379c5..74ab9a82 100644
--- a/tests/testframework/test_case_helpers.php
+++ b/tests/testframework/test_case_helpers.php
@@ -9,7 +9,7 @@
 
 namespace board3\portal\tests\testframework;
 
-abstract class test_case_helpers extends \phpbb_test_case_helpers
+class test_case_helpers extends \phpbb_test_case_helpers
 {
 	/**
 	* Copied from phpbb_test_case_helpers::get_test_config() to fix some paths