diff --git a/tools/print_signatures.py b/tools/print_signatures.py
index efb925a5a990ddf534aa58cd3b52cff781e4c4eb..6818c2550fd87109ab0d3c3d6d9e7a1ba9215861 100644
--- a/tools/print_signatures.py
+++ b/tools/print_signatures.py
@@ -105,6 +105,8 @@ def visit_member(parent_name, member):
             if hasattr(value, '__name__') and (not name.startswith("_") or
                                                name == "__init__"):
                 visit_member(cur_name, value)
+    elif inspect.ismethoddescriptor(member):
+        return
     elif callable(member):
         queue_dict(member, cur_name)
     elif inspect.isgetsetdescriptor(member):