diff --git a/python/lib/pythontarget.c b/python/lib/pythontarget.c
index 77dcdebcf..47baa685a 100644
--- a/python/lib/pythontarget.c
+++ b/python/lib/pythontarget.c
@@ -437,7 +437,7 @@ void destroy_action_capsule(PyObject* capsule) {
 PyObject* convert_C_port_to_py(void* port, int width) {
     // Create the port struct in Python
     PyObject* cap =
-        (PyObject*)PyObject_New(generic_port_capsule_struct, &py_port_capsule_t);
+        (PyObject*)PyObject_GC_New(generic_port_capsule_struct, &py_port_capsule_t);
     if (cap == NULL) {
         lf_print_error_and_exit("Failed to convert port.");
     }
@@ -506,7 +506,7 @@ PyObject* convert_C_action_to_py(void* action) {
     trigger_t* trigger = ((lf_action_base_t*)action)->trigger;
 
     // Create the action struct in Python
-    PyObject* cap = (PyObject*)PyObject_New(generic_action_capsule_struct, &py_action_capsule_t);
+    PyObject* cap = (PyObject*)PyObject_GC_New(generic_action_capsule_struct, &py_action_capsule_t);
     if (cap == NULL) {
         lf_print_error_and_exit("Failed to convert action.");
     }