diff --git a/ql/instruments/all.hpp b/ql/instruments/all.hpp
index 08db8903bed..69542fa7264 100644
--- a/ql/instruments/all.hpp
+++ b/ql/instruments/all.hpp
@@ -52,6 +52,7 @@
 #include <ql/instruments/quantobarrieroption.hpp>
 #include <ql/instruments/quantoforwardvanillaoption.hpp>
 #include <ql/instruments/quantovanillaoption.hpp>
+#include <ql/instruments/simplifynotificationgraph.hpp>
 #include <ql/instruments/stickyratchet.hpp>
 #include <ql/instruments/stock.hpp>
 #include <ql/instruments/swap.hpp>