diff --git a/biscuit/apps/alsijil/static/css/alsijil/full_register.css b/biscuit/apps/alsijil/static/css/alsijil/full_register.css
index ff1e2558bfe95bcba29e4da768b7cd6bc7655634..758ff73f17f889b1d60b6343968e9e92fe613d0b 100644
--- a/biscuit/apps/alsijil/static/css/alsijil/full_register.css
+++ b/biscuit/apps/alsijil/static/css/alsijil/full_register.css
@@ -125,8 +125,7 @@ tr.lessons-day-first {
 }
 
 th.lessons-day-head {
-  writing-mode: tb-rl;
-  transform: rotate(-180deg);
+  transform: rotate(-90deg);
 }
 
 tr.lesson-cancelled td.subj {