diff --git a/biscuit/apps/alsijil/models.py b/biscuit/apps/alsijil/models.py
index b4a57fc7751ddd72ebb611b5cb40c0a20cd3995f..1c59508e240100cfc5007b1ea9d18325082dc2a9 100644
--- a/biscuit/apps/alsijil/models.py
+++ b/biscuit/apps/alsijil/models.py
@@ -23,7 +23,7 @@ class PersonalNote(SchoolRelated):
 
 class LessonDocumentation(SchoolRelated):
     week = models.IntegerField()
-    lesson_period = models.ForeigbKey('chronos.LessonPeriod', models.CASCADE)
+    lesson_period = models.ForeignKey('chronos.LessonPeriod', models.CASCADE)
 
     topic = models.CharField(verbose_name=_('Lesson topic'), max_length=200, blank=True)
     homework = models.CharField(verbose_name=_('Homework'), max_length=200, blank=True)