diff --git a/todo.md b/todo.md
index d44a597..4c8e39a 100644
--- a/todo.md
+++ b/todo.md
@@ -23,7 +23,7 @@ https://tex.stackexchange.com/questions/515560/incompatibility-of-thmtools-ieeet
 
 - Cup with point above for disjoint union
 - Print a complex number i differently
-- function restriction (f|_X f\mid_X is not nice, take spacing from \upharpoonright ?) l. 156 \defon
+- function restriction (f|_X f\mid_X is not nice, take spacing from \!\upharpoonright\!{#1}) l. 156 \defon
 - macro for 'entspricht'
 - cev for reversed direction vector, l. 170 \cev
 - integration for mathbf?