diff --git a/linear/testGaussianJunctionTree.cpp b/linear/testGaussianJunctionTree.cpp
index 144f3dad7..9cbf6932e 100644
--- a/linear/testGaussianJunctionTree.cpp
+++ b/linear/testGaussianJunctionTree.cpp
@@ -17,6 +17,7 @@ using namespace boost::assign;
 
 #include "Ordering.h"
 #include "GaussianJunctionTree.h"
+#include "BayesTree-inl.h"
 
 using namespace std;
 using namespace gtsam;