diff --git a/libgnucash/app-utils/gnc-optiondb.i b/libgnucash/app-utils/gnc-optiondb.i
index 7a8f0ceb50..0626f105eb 100644
--- a/libgnucash/app-utils/gnc-optiondb.i
+++ b/libgnucash/app-utils/gnc-optiondb.i
@@ -40,6 +40,7 @@ namespace std {
 
  //%module sw_gnc_optiondb
 %{
+#include "gnc-optiondb.h"
 #include "gnc-optiondb.hpp"
 #include "gnc-optiondb-impl.hpp"
 #include "gnc-option-date.hpp"