diff --git a/tutorial/Core07/Core07.cpp b/tutorial/Core07/Core07.cpp
index 481c66f42..7a1ef8305 100644
--- a/tutorial/Core07/Core07.cpp
+++ b/tutorial/Core07/Core07.cpp
@@ -17,4 +17,9 @@ CONSOLE_APP_MAIN
 	Value v = x;
 	e = v;
 	DUMP(IsNull(e));
+	
+	int a = Null;
+	int b = 123;
+	int c = 1;
+	DUMP(Nvl(a, b, c));
 }
diff --git a/tutorial/Core07/init b/tutorial/Core07/init
new file mode 100644
index 000000000..8437a7ac2
--- /dev/null
+++ b/tutorial/Core07/init
@@ -0,0 +1,4 @@
+#ifndef _Core07_icpp_init_stub
+#define _Core07_icpp_init_stub
+#include "Core/init"
+#endif