diff --git a/ctle_code_gen/property_generator.py b/ctle_code_gen/property_generator.py
index d5d36da..dc721c7 100644
--- a/ctle_code_gen/property_generator.py
+++ b/ctle_code_gen/property_generator.py
@@ -164,14 +164,15 @@ def generate_property( path:str ):
 	out.ln('#pragma once')
 	out.ln()
 	out.ln('#include <functional>')
+	out.ln('#include <type_traits>')
 	out.ln('#include "status.h"')
 	out.ln()
 
 	out.ln('namespace ctle')
 	with out.blk():
 		out.comment_ln('trivially_default_constructible_identity_assign is a conditional template function which initializes trivially constructable values using the = {} assignment. For all other types, the template is a noop and does nothing.')
-		out.ln('template<typename _Ty, std::enable_if_t<std::is_trivially_default_constructible<_Ty>{},bool> = true> void trivially_default_constructible_identity_assign( _Ty &val ) { val = {}; }')
-		out.ln('template<typename _Ty, std::enable_if_t<!std::is_trivially_default_constructible<_Ty>{},bool> = true> void trivially_default_constructible_identity_assign( _Ty & ) { /*noop*/ }')
+		out.ln('template<typename _Ty, typename std::enable_if<std::is_trivially_default_constructible<_Ty>{},bool>::type = true> void trivially_default_constructible_identity_assign( _Ty &val ) { val = {}; }')
+		out.ln('template<typename _Ty, typename std::enable_if<!std::is_trivially_default_constructible<_Ty>{},bool>::type = true> void trivially_default_constructible_identity_assign( _Ty & ) { /*noop*/ }')
 		out.ln()
 
 		out.comment_ln('The property_[...] template classes are a convenient way to implement properties in classes, where each property can be accessed as a normal variable, but can also be made read-only, write-only, read/write, and let the owner class override if a value is returned from a variable, or evaluated on-the-fly, etc.')
diff --git a/unit_tests/test_property.cpp b/unit_tests/test_property.cpp
index f939bdf..60cb800 100644
--- a/unit_tests/test_property.cpp
+++ b/unit_tests/test_property.cpp
@@ -104,7 +104,7 @@ class folks
 			persons.v.resize(nums);
 			for (size_t i = 0; i < (size_t)nums; ++i)
 				{
-				persons.v[i] = std::make_unique<person>();
+				persons.v[i] = std::unique_ptr<person>( new person() );
 				}
 			simple_int.v = nums;
 			}
@@ -112,7 +112,7 @@ class folks
 	};
 
 folks::folks()
-	: persons( [this]( const auto *prop, status &result ) -> const auto & 
+	: persons( [this]( const property_getcref_value<std::vector<std::unique_ptr<person>>, folks> *prop, status &result ) -> const std::vector<std::unique_ptr<person>> &
 		{ 
 		if( prop->v.size() < 30 ) 
 			{ 
@@ -123,7 +123,7 @@ folks::folks()
 		return prop->v; 
 		} 
 	)
-	, simple_int( 23 , [this]( const auto *prop, status & ) -> const auto & { return prop->v; } )
+	, simple_int( 23 , [this]( const property_getcref_value<int, folks> *prop, status & ) -> const int & { return prop->v; } )
 	{
 	}