diff --git a/idg-lib/src/common/ArrayTypes.h b/idg-lib/src/common/ArrayTypes.h
index 63fb1bd2379dcf8e22f39194d865cda0b4daa1ef..b62440dbc8cd74e94e6464984535d20d80f2095c 100644
--- a/idg-lib/src/common/ArrayTypes.h
+++ b/idg-lib/src/common/ArrayTypes.h
@@ -279,6 +279,8 @@ class Array4D : public ArrayXD<T> {
     using ArrayXD<T>::ArrayXD;
 
     public:
+        Array4D() {};
+
         Array4D(
             size_t w_dim,
             size_t z_dim,