diff --git a/support/rst2md.py b/support/rst2md.py
index 3f072007..c6e59098 100755
--- a/support/rst2md.py
+++ b/support/rst2md.py
@@ -138,6 +138,13 @@ class Translator(nodes.NodeVisitor):
     def depart_table(self, node):
         pass
 
+    def visit_system_message(self, node):
+        pass
+
+    def depart_system_message(self, node):
+        pass
+
+
 class MDWriter(writers.Writer):
     """GitHub-flavored markdown writer"""