diff --git a/patch/__init__.py b/patch/__init__.py
index 4b73996..ccfb8d6 100644
--- a/patch/__init__.py
+++ b/patch/__init__.py
@@ -27,7 +27,7 @@ def cached_property(f):
 from .exceptions import NotConnectableError, NotConnectedError
 from .interpreter import PythonHocInterpreter
 
-__version__ = "4.0.0b4"
+__version__ = "4.0.0b5"
 p: "PythonHocInterpreter"
 h: "PythonHocInterpreter"
 
diff --git a/patch/objects.py b/patch/objects.py
index 3824807..7a06c4b 100644
--- a/patch/objects.py
+++ b/patch/objects.py
@@ -9,7 +9,7 @@
 
 
 _registration_queue = []
-_had_pointers_wrapped = set()
+_had_pointers_wrapped = {}
 
 
 def _safe_call(method):
@@ -188,8 +188,8 @@ def _init_pointers_wrappers(self):
                     if is_ptr:
                         setattr(cls, k, PointerWrapper(k))
                         params.append(k)
-            cls.parameters = params
-            _had_pointers_wrapped.add(hoctype)
+            _had_pointers_wrapped[hoctype] = params
+        self.parameters = _had_pointers_wrapped[hoctype]
 
 
 class Section(PythonHocObject, Connectable, WrapsPointers):