diff --git a/setup/runtimeenv.class.inc.php b/setup/runtimeenv.class.inc.php
index bfdd1362c..1bc8aa9d4 100644
--- a/setup/runtimeenv.class.inc.php
+++ b/setup/runtimeenv.class.inc.php
@@ -695,7 +695,7 @@ class RunTimeEnvironment
 		{
 			if (!@mkdir($sDir))
 			{
-				throw new Exception("Failed to create directory '$sTargetPath', please check the rights of the web server");
+				throw new Exception("Failed to create directory '$sDir', please check that the web server process has enough rights to create the directory.");
 			}
 			@chmod($sDir, 0770); // RWX for owner and group, nothing for others
 		}