diff --git a/uncompyle6/parsers/parse33.py b/uncompyle6/parsers/parse33.py
index c9f67712..1c1ee639 100644
--- a/uncompyle6/parsers/parse33.py
+++ b/uncompyle6/parsers/parse33.py
@@ -21,6 +21,9 @@ class Python33Parser(Python32Parser):
         iflaststmt    ::= testexpr c_stmts_opt33
         c_stmts_opt33 ::= JUMP_BACK JUMP_ABSOLUTE c_stmts_opt
 
+        whileTruestmt ::= SETUP_LOOP l_stmts JUMP_ABSOLUTE
+                          JUMP_BACK COME_FROM_LOOP
+
         # Python 3.5+ has jump optimization to remove the redundant
         # jump_excepts. But in 3.3 we need them added