diff --git a/src/maxwell/Probes.h b/src/maxwell/Probes.h
index 42180433..952aa8ad 100644
--- a/src/maxwell/Probes.h
+++ b/src/maxwell/Probes.h
@@ -2,6 +2,7 @@
 #include "mfem.hpp"
 #include "Types.h"
 
+
 namespace maxwell {
 
 class Probe {
diff --git a/src/maxwell/Types.h b/src/maxwell/Types.h
index 360d766b..47c6c744 100644
--- a/src/maxwell/Types.h
+++ b/src/maxwell/Types.h
@@ -1,5 +1,9 @@
 #pragma once
 
+#include <array>
+#include <vector>
+#include <map>
+
 #include "mfem.hpp"
 
 namespace maxwell {