diff --git a/ifAlias_persist b/ifAlias_persist
index 9f0180c..0810710 100755
--- a/ifAlias_persist
+++ b/ifAlias_persist
@@ -47,6 +47,7 @@ sub update_tree {
 			my ($key, $value) = ("$Base.$split[0]",$desc);
 			$self->add_oid_entry($key,$type,$value);
 		}
+	close $fh;
 	}
 	
 }