diff --git a/uncompyle6/parsers/parse23.py b/uncompyle6/parsers/parse23.py
index da1a1f82..cc8462c9 100644
--- a/uncompyle6/parsers/parse23.py
+++ b/uncompyle6/parsers/parse23.py
@@ -32,6 +32,9 @@ class Python23Parser(Python24Parser):
         while1stmt ::= _while1test l_stmts_opt JUMP_BACK
                        POP_TOP POP_BLOCK COME_FROM
 
+        while1stmt ::= _while1test l_stmts_opt JUMP_BACK
+                       POP_TOP POP_BLOCK
+
         while1stmt ::= _while1test l_stmts_opt JUMP_BACK
                        COME_FROM POP_TOP POP_BLOCK COME_FROM
 
diff --git a/uncompyle6/parsers/parse24.py b/uncompyle6/parsers/parse24.py
index 6a18b317..a178a9d9 100644
--- a/uncompyle6/parsers/parse24.py
+++ b/uncompyle6/parsers/parse24.py
@@ -33,8 +33,8 @@ class Python24Parser(Python25Parser):
         import_cont    ::= filler LOAD_CONST alias
 
         # Python 2.5+ omits POP_TOP POP_BLOCK
-        while1stmt ::= SETUP_LOOP l_stmts JUMP_BACK POP_TOP POP_BLOCK COME_FROM
         while1stmt ::= SETUP_LOOP l_stmts_opt JUMP_BACK POP_TOP POP_BLOCK COME_FROM
+        while1stmt ::= SETUP_LOOP l_stmts_opt JUMP_BACK POP_TOP POP_BLOCK
 
         # Python 2.5+:
         #  call_stmt ::= expr POP_TOP
diff --git a/uncompyle6/parsers/parse26.py b/uncompyle6/parsers/parse26.py
index 8af0bb0d..7268ab8e 100644
--- a/uncompyle6/parsers/parse26.py
+++ b/uncompyle6/parsers/parse26.py
@@ -135,6 +135,7 @@ class Python26Parser(Python2Parser):
         setup_finally ::= STORE_NAME SETUP_FINALLY LOAD_NAME DELETE_NAME
 
         while1stmt     ::= SETUP_LOOP l_stmts JUMP_BACK COME_FROM
+        while1stmt     ::= SETUP_LOOP l_stmts_opt JUMP_BACK
 
         whilestmt      ::= SETUP_LOOP testexpr l_stmts_opt jb_pop POP_BLOCK _come_froms
         whilestmt      ::= SETUP_LOOP testexpr l_stmts_opt jb_cf_pop bp_come_from