diff --git a/Lib/struct.py b/Lib/struct.py
index dca15e2..9bfc23f 100644
--- a/Lib/struct.py
+++ b/Lib/struct.py
@@ -1,6 +1,6 @@
 __all__ = [
     # Functions
-    'calcsize', 'pack', 'unpack', 'unpack', 'unpack_from',
+    'calcsize', 'pack', 'pack_into', 'unpack', 'unpack_from',
 
     # Classes
     'Struct',