diff --git a/Lib/importlib/_bootstrap_external.py b/Lib/importlib/_bootstrap_external.py
index f4dbbebcd224c8..71a16064b8ec0a 100644
--- a/Lib/importlib/_bootstrap_external.py
+++ b/Lib/importlib/_bootstrap_external.py
@@ -1144,7 +1144,8 @@ def get_code(self, fullname):
                 source_mtime is not None):
             if hash_based:
                 if source_hash is None:
-                    source_hash = _imp.source_hash(source_bytes)
+                    source_hash = _imp.source_hash(_RAW_MAGIC_NUMBER,
+                                                   source_bytes)
                 data = _code_to_hash_pyc(code_object, source_hash, check_source)
             else:
                 data = _code_to_timestamp_pyc(code_object, source_mtime,
diff --git a/Misc/NEWS.d/next/Library/2022-11-21-10-45-54.gh-issue-99508.QqVbby.rst b/Misc/NEWS.d/next/Library/2022-11-21-10-45-54.gh-issue-99508.QqVbby.rst
new file mode 100644
index 00000000000000..82720d17bcafd3
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2022-11-21-10-45-54.gh-issue-99508.QqVbby.rst
@@ -0,0 +1,2 @@
+Fix ``TypeError`` in ``Lib/importlib/_bootstrap_external.py`` while calling
+``_imp.source_hash()``.