1 files changed, 4 insertions, 0 deletions
diff --git a/apps/apps.h b/apps/apps.h
index d54110b..f3d6eae 100644
--- a/apps/apps.h
+++ b/apps/apps.h
@@ -6,11 +6,15 @@
 #include <boost/program_options/variables_map.hpp>
 #include <stdexcept>
 #include <iosfwd>
+#include <experimental/optional>
 #include <json.hpp>
 
 namespace trygvis {
 namespace apps {
 
+template<typename T>
+using o = std::experimental::optional<T>;
+
 namespace po = boost::program_options;
 using namespace log4cplus;