diff --git a/uppdev/ArrayOne/ArrayOne.cpp b/uppdev/ArrayOne/ArrayOne.cpp
new file mode 100644
index 000000000..4e5a8f468
--- /dev/null
+++ b/uppdev/ArrayOne/ArrayOne.cpp
@@ -0,0 +1,18 @@
+#include <Core/Core.h>
+
+using namespace Upp;
+
+struct ArrayOneHelper {
+	Array<T> array;
+	One<T>   one;
+
+public:
+	operator One<T>&();
+	
+	~ArrayOneHelper() { array.Add(one.Detach()); }
+};
+
+CONSOLE_APP_MAIN
+{
+	Test(array.AddOne());
+}
diff --git a/uppdev/ArrayOne/ArrayOne.upp b/uppdev/ArrayOne/ArrayOne.upp
new file mode 100644
index 000000000..ea196c485
--- /dev/null
+++ b/uppdev/ArrayOne/ArrayOne.upp
@@ -0,0 +1,9 @@
+uses
+	Core;
+
+file
+	ArrayOne.cpp;
+
+mainconfig
+	"" = "";
+