diff --git a/php/helpers/getExtension.php b/php/helpers/getExtension.php
index 2a48ad8..0716aa6 100644
--- a/php/helpers/getExtension.php
+++ b/php/helpers/getExtension.php
@@ -14,6 +14,7 @@ function getExtension($filename, $isURI = false) {
 	// Special cases
 	// https://github.com/electerious/Lychee/issues/482
 	list($extension) = explode(':', $extension, 2);
+	list($extension) = explode('?', $extension, 2);
 
 	if (empty($extension)===false) $extension = '.' . $extension;