diff -r 66a1fbdbe4bb Modules/_curses_panel.c
--- a/Modules/_curses_panel.c	Thu May 05 16:21:35 2016 +0300
+++ b/Modules/_curses_panel.c	Fri May 06 15:13:46 2016 +0300
@@ -220,6 +220,11 @@ PyCursesPanel_New(PANEL *pan, PyCursesWi
 static void
 PyCursesPanel_Dealloc(PyCursesPanelObject *po)
 {
+    PyObject *obj = (PyObject *) panel_userptr(po->pan);
+    if (obj) {
+        (void)set_panel_userptr(po->pan, NULL);
+        Py_DECREF(obj);
+    }
     (void)del_panel(po->pan);
     if (po->wo != NULL) {
         Py_DECREF(po->wo);