diff --git a/biscuit/apps/alsijil/static/css/alsijil/lesson.css b/biscuit/apps/alsijil/static/css/alsijil/lesson.css
index 2cdd497ddbc336aabeff2c93ba12492eccf64c30..e3c94542ab489675e04f6a3c214f1bbbf2b4fb30 100644
--- a/biscuit/apps/alsijil/static/css/alsijil/lesson.css
+++ b/biscuit/apps/alsijil/static/css/alsijil/lesson.css
@@ -3,3 +3,7 @@ input.alsijil-lesson-personal-note-name:disabled {
     border: 0;
     color: #212529;
 }
+
+.alsijil-lesson-cancelled {
+    text-decoration: line-through;
+}
diff --git a/biscuit/apps/alsijil/templates/alsijil/group_week.html b/biscuit/apps/alsijil/templates/alsijil/group_week.html
index fd25a1da6ecb8a357989e1f36d0ba67912a23ecd..1c8a29be8607f099b6b955c10c8267ed59507d7d 100644
--- a/biscuit/apps/alsijil/templates/alsijil/group_week.html
+++ b/biscuit/apps/alsijil/templates/alsijil/group_week.html
@@ -47,6 +47,9 @@
                         {% else %}
                           {% if period.get_substitution %}
                             table-warning
+                            {% if period.get_substitution.cancelled %}
+                              alsijil-lesson-cancelled
+                            {% endif %}
                           {% endif %}
                         {% endif %}
                       {% endif %}