1 files changed, 2 insertions, 1 deletions
diff --git a/src/undo.c b/src/undo.c
index c8b22ab..18f90c5 100644
--- a/src/undo.c
+++ b/src/undo.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012-2025 Robin Haberkorn
+ * Copyright (C) 2012-2026 Robin Haberkorn
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -34,6 +34,7 @@ TECO_DEFINE_UNDO_SCALAR(gunichar);
 TECO_DEFINE_UNDO_SCALAR(gint);
 TECO_DEFINE_UNDO_SCALAR(guint);
 TECO_DEFINE_UNDO_SCALAR(gsize);
+TECO_DEFINE_UNDO_SCALAR(gssize);
 TECO_DEFINE_UNDO_SCALAR(teco_int_t);
 TECO_DEFINE_UNDO_SCALAR(gboolean);
 TECO_DEFINE_UNDO_SCALAR(gconstpointer);