diff --git a/libgnucash/app-utils/gnc-optiondb.i b/libgnucash/app-utils/gnc-optiondb.i
index 7415e3176f..5f78cabdf0 100644
--- a/libgnucash/app-utils/gnc-optiondb.i
+++ b/libgnucash/app-utils/gnc-optiondb.i
@@ -67,6 +67,7 @@ namespace std {
 #include "gnc-optiondb.hpp"
 #include "gnc-optiondb-impl.hpp"
 #include "gnc-option-date.hpp"
+#include <array>
 #include <sstream>
 #include <iomanip>