diff --git a/tutorial/Grid01/init b/tutorial/Grid01/init
new file mode 100644
index 000000000..27793d786
--- /dev/null
+++ b/tutorial/Grid01/init
@@ -0,0 +1,5 @@
+#ifndef _Grid01_icpp_init_stub
+#define _Grid01_icpp_init_stub
+#include "CtrlLib/init"
+#include "GridCtrl/init"
+#endif
diff --git a/tutorial/Gui12/init b/tutorial/Gui12/init
new file mode 100644
index 000000000..f0220ab4a
--- /dev/null
+++ b/tutorial/Gui12/init
@@ -0,0 +1,4 @@
+#ifndef _Gui12_icpp_init_stub
+#define _Gui12_icpp_init_stub
+#include "CtrlLib/init"
+#endif
diff --git a/tutorial/Ntl04/Ntl04.cpp b/tutorial/Ntl04/Ntl04.cpp
index e36dd7946..bd98e69e2 100644
--- a/tutorial/Ntl04/Ntl04.cpp
+++ b/tutorial/Ntl04/Ntl04.cpp
@@ -5,6 +5,9 @@ using namespace Upp;
 struct Distribution : Moveable<Distribution> {
 	String      text;
 	Vector<int> data;
+	
+	rval_default(Distribution);
+	Distribution() {}
 };
 
 Distribution CreateDist(int n)
diff --git a/tutorial/Ntl15/Ntl15.cpp b/tutorial/Ntl15/Ntl15.cpp
index 2eecd3159..c7817a775 100644
--- a/tutorial/Ntl15/Ntl15.cpp
+++ b/tutorial/Ntl15/Ntl15.cpp
@@ -21,7 +21,7 @@ CONSOLE_APP_MAIN
 	
 	y.b = "a";
 	
-	DUMP(SgnCompare(y));
+	DUMP(SgnCompare(x, y));
 	DUMP(x < y);
 	
 	static Tuple2<int, const char *> map[] = {