diff --git a/cpp/telescope/mwa.h b/cpp/telescope/mwa.h
index 54d0cc3b5ecb697973954c4208d08c5ad9b6732e..3414c2f8c8cb7c845b8df866f649a1efd06cee6d 100644
--- a/cpp/telescope/mwa.h
+++ b/cpp/telescope/mwa.h
@@ -11,6 +11,8 @@
 
 #include <casacore/measures/Measures/MPosition.h>
 
+#include <array>
+
 namespace everybeam {
 
 namespace griddedresponse {