diff --git a/gtsam/linear/GaussianConditional-inl.h b/gtsam/linear/GaussianConditional-inl.h
index dd0307c48..45d7ecc3b 100644
--- a/gtsam/linear/GaussianConditional-inl.h
+++ b/gtsam/linear/GaussianConditional-inl.h
@@ -19,9 +19,6 @@
 
 #pragma once
 
-#include <boost/range/join.hpp>
-#include <boost/assign/list_of.hpp>
-
 namespace gtsam {
 
   /* ************************************************************************* */