diff --git a/Eigen/SparseCholesky b/Eigen/SparseCholesky
index 5f82742f7..05b96db6c 100644
--- a/Eigen/SparseCholesky
+++ b/Eigen/SparseCholesky
@@ -2,6 +2,7 @@
 #define EIGEN_SPARSECHOLESKY_MODULE_H
 
 #include "SparseCore"
+#include "OrderingMethods"
 
 #include "src/Core/util/DisableStupidWarnings.h"