diff --git a/lib/functions/filedir/function.makeCorrectDir.php b/lib/functions/filedir/function.makeCorrectDir.php
index dcc91ca2..4dd3c3d4 100644
--- a/lib/functions/filedir/function.makeCorrectDir.php
+++ b/lib/functions/filedir/function.makeCorrectDir.php
@@ -27,9 +27,9 @@
 function makeCorrectDir($dir) {
 
 	if (version_compare("5.4.6", PHP_VERSION, ">")) {
-		assert('is_string($dir) && strlen($dir) > 0 /* $dir does not look like an actual folder name */');
+		assert(is_string($dir) && strlen($dir) > 0);/* $dir does not look like an actual folder name */
 	} else {
-		assert('is_string($dir) && strlen($dir) > 0', 'Value "' . $dir .'" does not look like an actual folder name');
+		assert((is_string($dir) && strlen($dir) > 0), 'Value "' . $dir .'" does not look like an actual folder name');
 	}
 
 	$dir = trim($dir);