diff --git a/docs/classes/tree_sitter.Language.rst b/docs/classes/tree_sitter.Language.rst
index e5e238b..7448bcd 100644
--- a/docs/classes/tree_sitter.Language.rst
+++ b/docs/classes/tree_sitter.Language.rst
@@ -29,6 +29,10 @@ Language
       .. versionadded:: 0.22.0
    .. automethod:: __hash__
 
+      .. important::
+
+         On 32-bit platforms, you must use ``hash(self) & 0xFFFFFFFF`` to get the actual hash.
+
       .. versionadded:: 0.22.0
    .. automethod:: __ne__
 
diff --git a/tests/test_language.py b/tests/test_language.py
index 6bf8e03..747fa62 100644
--- a/tests/test_language.py
+++ b/tests/test_language.py
@@ -1,3 +1,4 @@
+from sys import maxsize
 from unittest import TestCase
 
 from tree_sitter import Language, Query
@@ -79,4 +80,5 @@ def test_hash(self):
             with self.subTest(language=name):
                 ptr = getattr(self, name)
                 lang = Language(ptr)
-                self.assertEqual(hash(lang), ptr)
+                hash_ = hash(lang) & maxsize << 1
+                self.assertEqual(hash_, ptr)
diff --git a/tree_sitter/binding/lookahead_iterator.c b/tree_sitter/binding/lookahead_iterator.c
index df1f856..e283d57 100644
--- a/tree_sitter/binding/lookahead_iterator.c
+++ b/tree_sitter/binding/lookahead_iterator.c
@@ -52,8 +52,8 @@ PyObject *lookahead_iterator_reset(LookaheadIterator *self, PyObject *args) {
         return NULL;
     }
 
-    Py_ssize_t language_id = PyLong_AsSsize_t(language_obj);
-    if (language_id < 1 || (language_id % sizeof(TSLanguage *)) != 0) {
+    Py_uintptr_t language_id = PyLong_AsSize_t(language_obj);
+    if (language_id == 0 || (language_id % sizeof(TSLanguage *)) != 0) {
         if (!PyErr_Occurred()) {
             PyErr_SetString(PyExc_ValueError, "invalid language ID");
         }