diff --git a/phpBB/phpbb/path_helper.php b/phpBB/phpbb/path_helper.php
index 7b0d6f0fba..154361ef64 100644
--- a/phpBB/phpbb/path_helper.php
+++ b/phpBB/phpbb/path_helper.php
@@ -100,11 +100,18 @@ class path_helper
 	*/
 	public function update_web_root_path($path)
 	{
+		$web_root_path = $this->get_web_root_path();
+
+		// Removes the web root path if it is already present
+		if (strpos($path, $web_root_path) === 0)
+		{
+			$path = $this->phpbb_root_path . substr($path, strlen($web_root_path));
+		}
+
 		if (strpos($path, $this->phpbb_root_path) === 0)
 		{
 			$path = substr($path, strlen($this->phpbb_root_path));
 
-			$web_root_path = $this->get_web_root_path();
 			if (substr($web_root_path, -8) === 'app.php/' && substr($path, 0, 7) === 'app.php')
 			{
 				$path = substr($path, 8);
diff --git a/tests/path_helper/path_helper_test.php b/tests/path_helper/path_helper_test.php
index 007441bc92..49dd40fbec 100644
--- a/tests/path_helper/path_helper_test.php
+++ b/tests/path_helper/path_helper_test.php
@@ -135,6 +135,43 @@ class phpbb_path_helper_test extends phpbb_test_case
 				'/phpbb3-fork/phpBB/app.php',
 				'./../',
 			),
+
+			// No correction if the path is already prepend by the web root path
+			array(
+				'./../' . $this->phpbb_root_path . 'test.php',
+				'//',
+				null,
+				null,
+				'',
+			),
+			array(
+				'./../' . $this->phpbb_root_path . 'test.php',
+				'//',
+				'foo/bar.php',
+				'bar.php',
+				'',
+			),
+			array(
+				'./../../' . $this->phpbb_root_path . 'test.php',
+				'/foo/template',
+				'/phpbb3-fork/phpBB/app.php/foo/template',
+				'/phpbb3-fork/phpBB/app.php',
+				'',
+			),
+			array(
+				'./../' . $this->phpbb_root_path . 'test.php',
+				'/foo/template',
+				'/phpbb3-fork/phpBB/foo/template',
+				'/phpbb3-fork/phpBB/app.php',
+				'',
+			),
+			array(
+				'./../'.$this->phpbb_root_path . 'test.php',
+				'/',
+				'/phpbb3-fork/phpBB/app.php/',
+				'/phpbb3-fork/phpBB/app.php',
+				'',
+			),
 		);
 	}