diff --git a/sphinx/ext/oldcmarkup.py b/sphinx/ext/oldcmarkup.py
index c2172b088..84ae61dd2 100644
--- a/sphinx/ext/oldcmarkup.py
+++ b/sphinx/ext/oldcmarkup.py
@@ -61,3 +61,4 @@ def setup(app):
     app.add_role('cfunc', old_crole)
     app.add_role('cmacro', old_crole)
     app.add_role('ctype', old_crole)
+    app.add_role('cmember', old_crole)