diff --git a/gtsam/inference/MetisIndex.h b/gtsam/inference/MetisIndex.h
index e3b7ea33d..684755895 100644
--- a/gtsam/inference/MetisIndex.h
+++ b/gtsam/inference/MetisIndex.h
@@ -25,7 +25,7 @@
 #include <gtsam/base/timing.h>
 #include <gtsam/inference/Key.h>
 #include <gtsam/inference/FactorGraph.h>
-#include <metis.h>
+#include <gtsam/3rdparty/metis-5.1.0/include/metis.h>
 #include <boost/bimap.hpp>
 
 namespace gtsam {