diff --git a/gtsam_unstable/linear/iterative.h b/gtsam_unstable/linear/iterative.h
index 6765ac22a..29233ae27 100644
--- a/gtsam_unstable/linear/iterative.h
+++ b/gtsam_unstable/linear/iterative.h
@@ -148,3 +148,6 @@ namespace gtsam {
 
 
 } // namespace gtsam
+
+#include <gtsam_unstable/linear/iterative-inl.h>
+