diff --git a/autoload/repeat.vim b/autoload/repeat.vim
index f00e92b..88a20bb 100644
--- a/autoload/repeat.vim
+++ b/autoload/repeat.vim
@@ -37,8 +37,13 @@ let g:loaded_repeat = 1
 
 let g:repeat_tick = -1
 
+" Special function to avoid spurious repeats in a related, naturally repeating
+" mapping when your repeatable mapping doesn't increase b:changedtick.
+function! repeat#invalidate()
+    let g:repeat_tick = -1
+endfunction
+
 function! repeat#set(sequence,...)
-    call setline(line('.'), getline('.'))
     let g:repeat_sequence = a:sequence
     let g:repeat_count = a:0 ? a:1 : v:count
     let g:repeat_tick = b:changedtick