diff --git a/humbug/backends.py b/humbug/backends.py
index 6e457defa2..4fe34d53c6 100644
--- a/humbug/backends.py
+++ b/humbug/backends.py
@@ -17,7 +17,7 @@ class EmailAuthBackend(object):
             return None
 
         try:
-            user = User.objects.get(email=username)
+            user = User.objects.get(email__iexact=username)
             if user.check_password(password):
                 return user
         except User.DoesNotExist: