diff --git a/README.md b/README.md
index 5d5f76b..6827f7d 100644
--- a/README.md
+++ b/README.md
@@ -57,4 +57,4 @@ By running `python -m mpyc` instead you even get this REPL with the MPyC runtime
 The file `gen.bat` shows how to generate fresh key material for SSL. To generate SSL key material of your own, first run
 `pip install cryptography`.
 
-Copyright © 2018-2024 Berry Schoenmakers
\ No newline at end of file
+Copyright © 2018-2025 Berry Schoenmakers
\ No newline at end of file
diff --git a/docs/conf.py b/docs/conf.py
index 6b0fb44..75cf950 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -21,7 +21,7 @@
 # -- Project information -----------------------------------------------------
 
 project = 'MPyC'
-copyright = '2018 - 2024, Berry Schoenmakers'
+copyright = '2018 - 2025, Berry Schoenmakers'
 author = 'Berry Schoenmakers'
 
 # The short X.Y version
diff --git a/mpyc/gfpx.py b/mpyc/gfpx.py
index a3d1654..73af52a 100644
--- a/mpyc/gfpx.py
+++ b/mpyc/gfpx.py
@@ -304,6 +304,9 @@ def _mul(cls, a, b):
 
     @classmethod
     def _lshift(cls, a, n):
+        if not a:
+            return []
+
         return [0] * n + a
 
     @classmethod