---
 Doc/tools/extensions/pyspecific.py |   11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

--- a/Doc/tools/extensions/pyspecific.py
+++ b/Doc/tools/extensions/pyspecific.py
@@ -31,14 +31,17 @@ Body.enum.converters['loweralpha'] = \
 # doctest docs themselves
 orig_visit_literal_block = HTMLTranslator.visit_literal_block
 def new_visit_literal_block(self, node):
+    old_trim_doctest_flags = None
     meta = self.builder.env.metadata[self.builder.current_docname]
-    old_trim_doctest_flags = self.highlighter.trim_doctest_flags
-    if 'keepdoctest' in meta:
-        self.highlighter.trim_doctest_flags = False
+    if hasattr(self.highlighter, 'trim_doctest_flags'):
+        old_trim_doctest_flags = self.highlighter.trim_doctest_flags
+        if 'keepdoctest' in meta:
+            self.highlighter.trim_doctest_flags = False
     try:
         orig_visit_literal_block(self, node)
     finally:
-        self.highlighter.trim_doctest_flags = old_trim_doctest_flags
+        if old_trim_doctest_flags is not None:
+            self.highlighter.trim_doctest_flags = old_trim_doctest_flags
 
 HTMLTranslator.visit_literal_block = new_visit_literal_block