diff --git a/libmproxy/contrib/pyparsing.py b/libmproxy/contrib/pyparsing.py
index e0457f15e..496ace54c 100644
--- a/libmproxy/contrib/pyparsing.py
+++ b/libmproxy/contrib/pyparsing.py
@@ -3402,7 +3402,7 @@ def _makeTags(tagStr, xml):
                 Dict(ZeroOrMore(Group( tagAttrName + Suppress("=") + tagAttrValue ))) + \
                 Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")
     else:
-        printablesLessRAbrack = "".join(c for c in printables if c not in ">")
+        printablesLessRAbrack = "".join(c for c in printables if c != ">")
         tagAttrValue = quotedString.copy().setParseAction( removeQuotes ) | Word(printablesLessRAbrack)
         openTag = Suppress("<") + tagStr + \
                 Dict(ZeroOrMore(Group( tagAttrName.setParseAction(downcaseTokens) + \