diff --git a/system/helpers/download_helper.php b/system/helpers/download_helper.php
index 34380cc..a8c59c2 100644
--- a/system/helpers/download_helper.php
+++ b/system/helpers/download_helper.php
@@ -70,7 +70,8 @@
 				return FALSE;
 			}
 
-			$extension = end(explode('.', $filename));
+			$extension = explode('.', $filename);
+			$extension = end($extension);
 
 			// Load the mime types
 			if (defined('ENVIRONMENT') && is_file(APPPATH.'config/'.ENVIRONMENT.'/mimes.php'))