diff --git a/builtins.txt b/builtins.txt
index 95d8241..8a940d7 100644
--- a/builtins.txt
+++ b/builtins.txt
@@ -1,4 +1,4 @@
-// Generated by LSL2 Derived Files Generator. Database version: 0.0.20170317001; output module version: 0.0.20140731000
+// Generated by LSL2 Derived Files Generator. Database version: 0.0.20170615000; output module version: 0.0.20140731000
 integer llAbs( integer val )
 float llAcos( float val )
 void llAddToLandBanList( key avatar, float hours )
@@ -626,6 +626,7 @@ const integer HTTP_CUSTOM_HEADER = 5
 const integer HTTP_METHOD = 0
 const integer HTTP_MIMETYPE = 1
 const integer HTTP_PRAGMA_NO_CACHE = 6
+const integer HTTP_USER_AGENT = 7
 const integer HTTP_VERBOSE_THROTTLE = 4
 const integer HTTP_VERIFY_CERT = 3
 const integer INVENTORY_ALL = -1
diff --git a/lslopt/lslfoldconst.py b/lslopt/lslfoldconst.py
index caf8054..5f45907 100644
--- a/lslopt/lslfoldconst.py
+++ b/lslopt/lslfoldconst.py
@@ -1008,14 +1008,15 @@ class foldconst(object):
                 elif self.optlistlength and node['name'] == 'llGetListLength':
                     # Convert llGetListLength(expr) to (expr != [])
                     node = {'nt':'CONST', 't':'list', 'value':[]}
-                    parent[index] = node = {'nt':'!=', 't':'list', 'ch':[child[0], node]}
+                    parent[index] = node = {'nt':'!=', 't':'list',
+                                            'ch':[child[0], node]}
                 elif (node['name'] == 'llDumpList2String'
                       and child[1]['nt'] == 'CONST'
                       and child[1]['t'] in ('string', 'key')
                       and child[1]['value'] == u""):
                     # Convert llDumpList2String(expr, "") to (string)(expr)
-                    del child[1]
                     node['nt'] = 'CAST'
+                    del child[1]
                     del node['name']
             elif SEFargs and 'SEF' in self.symtab[0][node['name']]:
                 # The function is marked as SEF in the symbol table, and the