diff --git a/argp/Versions b/argp/Versions
index bf13642066..378320c44d 100644
--- a/argp/Versions
+++ b/argp/Versions
@@ -7,5 +7,8 @@ libc {
     # a*
     argp_error; argp_failure; argp_help; argp_parse; argp_state_help;
     argp_usage;
+
+    # kludge for recursive argp callers that know the magic.
+    _argp_unlock_xxx;
   }
 }