diff --git a/src/testdir/test_undo.vim b/src/testdir/test_undo.vim
index b4506cb..a68321f 100644
--- a/src/testdir/test_undo.vim
+++ b/src/testdir/test_undo.vim
@@ -3,7 +3,7 @@
 " undo-able pieces.  Do that by setting 'undolevels'.
 " Also tests :earlier and :later.
 
-source screendump.vim
+source util/screendump.vim
 
 func Test_undotree()
   new