diff --git a/advlabdb/models.py b/advlabdb/models.py
index c88e592..1e77644 100644
--- a/advlabdb/models.py
+++ b/advlabdb/models.py
@@ -599,7 +599,7 @@ class User(db.Model, FsUserMixin):
     admin = db.relationship("Admin", back_populates="user", lazy=False, uselist=False)
     assistant = db.relationship("Assistant", back_populates="user", lazy=True, uselist=False)
 
-    def setActiveSemester(semester):
+    def setActiveSemester(self, semester):
         if semester is None:
             flash(f"Can not change the active semester to None!", "error")
             return