diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index 12c6b68..549dcff 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -30,6 +30,8 @@
 							*known-bugs*
 -------------------- Known bugs and current work -----------------------
 
+gtk_selection_clear_targets not available in GTK1 (Patrick Texier)
+
 Cursor positioning wrong with 0x200e character. (John Becket, 2010 May 6)
 
 E315 when trying to change a file in FileChangedRO autocommand event.