diff --git a/MeshLib/Utils/transformMeshToNodePartitionedMesh.cpp b/MeshLib/Utils/transformMeshToNodePartitionedMesh.cpp
index cf733872fd95f578f982b06a6a71aa8c24139612..b06a9bde3b58bb31936041911f6c37b49a8cc02d 100644
--- a/MeshLib/Utils/transformMeshToNodePartitionedMesh.cpp
+++ b/MeshLib/Utils/transformMeshToNodePartitionedMesh.cpp
@@ -17,6 +17,7 @@
 #include <range/v3/view/enumerate.hpp>
 #include <range/v3/view/indirect.hpp>
 #include <range/v3/view/map.hpp>
+#include <unordered_map>
 #include <vector>
 
 #include "BaseLib/Logging.h"