diff --git a/NumLib/StaggeredCoupling/CreateStaggeredCoupling.h b/NumLib/StaggeredCoupling/CreateStaggeredCoupling.h
index e533dbccc3d66fe26c025bf26e46c71e00a459a3..eb4efc471f814311fbee00782d0f32adcd6fb043 100644
--- a/NumLib/StaggeredCoupling/CreateStaggeredCoupling.h
+++ b/NumLib/StaggeredCoupling/CreateStaggeredCoupling.h
@@ -12,6 +12,7 @@
 #pragma once
 
 #include <memory>
+#include <string>
 #include <vector>
 
 namespace BaseLib