Add missing name in pkgutil.__all__
diff --git a/Lib/pkgutil.py b/Lib/pkgutil.py
index 0ec6ec5..e2d630a 100644
--- a/Lib/pkgutil.py
+++ b/Lib/pkgutil.py
@@ -8,7 +8,7 @@
 
 __all__ = [
     'get_importer', 'iter_importers', 'get_loader', 'find_loader',
-    'walk_packages', 'iter_modules',
+    'walk_packages', 'iter_modules', 'get_data',
     'ImpImporter', 'ImpLoader', 'read_code', 'extend_path',
 ]