diff --git a/htdocs/core/class/interfaces.class.php b/htdocs/core/class/interfaces.class.php
index 655969d73f6..2960d4cf327 100644
--- a/htdocs/core/class/interfaces.class.php
+++ b/htdocs/core/class/interfaces.class.php
@@ -151,6 +151,8 @@ class Interfaces
                         $i++;
                     }
                 }
+
+		closedir($handle);
             }
         }