diff --git a/src/include/stir/IO/GEHDF5Wrapper.h b/src/include/stir/IO/GEHDF5Wrapper.h
index 9d3a8d0e5..4963c02d1 100644
--- a/src/include/stir/IO/GEHDF5Wrapper.h
+++ b/src/include/stir/IO/GEHDF5Wrapper.h
@@ -31,6 +31,7 @@
 #include "H5Cpp.h"
 
 #include <string>
+#include <array>
 
 START_NAMESPACE_STIR