diff --git a/kitty/data-types.c b/kitty/data-types.c
index 06fd2a362..bbad39203 100644
--- a/kitty/data-types.c
+++ b/kitty/data-types.c
@@ -689,7 +689,10 @@ set_uint_at_address(PyObject *self UNUSED, PyObject *args) {
     unsigned int value;
     if (!PyArg_ParseTuple(args, "OI", &address_obj, &value)) return NULL;
     void *ptr = PyLong_AsVoidPtr(address_obj);
-    if (ptr == NULL && PyErr_Occurred()) return NULL;
+    if (ptr == NULL) {
+        if (!PyErr_Occurred()) PyErr_SetString(PyExc_ValueError, "NULL address is not valid");
+        return NULL;
+    }
     *((unsigned int*)ptr) = value;
     Py_RETURN_NONE;
 }
@@ -727,7 +730,7 @@ static PyMethodDef module_methods[] = {
     {"timed_debug_print", (PyCFunction)py_timed_debug_print, METH_VARARGS, ""},
     {"find_in_memoryview", (PyCFunction)find_in_memoryview, METH_VARARGS, ""},
     {"run_at_exit_cleanup_functions", (PyCFunction)py_run_atexit_cleanup_functions, METH_NOARGS, ""},
-    {"set_uint_at_address", (PyCFunction)set_uint_at_address, METH_VARARGS, ""},
+    {"set_uint_at_address", (PyCFunction)set_uint_at_address, METH_VARARGS, "Write an unsigned integer value to a memory address"},
 #ifdef __APPLE__
     METHODB(user_cache_dir, METH_NOARGS),
     METHODB(process_group_map, METH_NOARGS),