diff --git a/dimod/core/structured.py b/dimod/core/structured.py
index 4ba44160a..b037dad9d 100644
--- a/dimod/core/structured.py
+++ b/dimod/core/structured.py
@@ -74,7 +74,6 @@ def sample(self, bqm):
 import abc
 
 from collections import namedtuple
-from dimod.exceptions import BinaryQuadraticModelStructureError
 
 __all__ = ['Structured']