diff --git a/src/wren/vm.cpp b/src/wren/vm.cpp
index f1af1a3..5b953eb 100644
--- a/src/wren/vm.cpp
+++ b/src/wren/vm.cpp
@@ -188,6 +188,11 @@ namespace wren {
 		return {data, length};
 	}
 
+	void* VM::slot_foreign (int slot_num) {
+		assert(SlotType::Foreign == slot_type(slot_num));
+		return wrenGetSlotForeign(m_local->wvm, slot_num);
+	}
+
 	void VM::set_slot_string (int slot_num, const char* value) {
 		wrenSetSlotString(m_local->wvm, slot_num, value);
 	}
@@ -208,6 +213,10 @@ namespace wren {
 		wrenSetSlotBytes(m_local->wvm, slot_num, bytes, length);
 	}
 
+	void* VM::set_slot_new_foreign (int slot_num, int class_slot, std::size_t size) {
+		return wrenSetSlotNewForeign(m_local->wvm, slot_num, class_slot, size);
+	}
+
 	void VM::ensure_slots (int num_slots) {
 		wrenEnsureSlots(m_local->wvm, num_slots);
 	}
diff --git a/src/wren/vm.hpp b/src/wren/vm.hpp
index a50213b..f239a0a 100644
--- a/src/wren/vm.hpp
+++ b/src/wren/vm.hpp
@@ -68,12 +68,14 @@ namespace wren {
 		void set_slot_bool (int slot_num, bool value);
 		void set_slot_null (int slot_num);
 		void set_slot_bytes (int slot_num, const char* bytes, std::size_t length);
+		void* set_slot_new_foreign (int slot_num, int class_slot, std::size_t size);
 
 		//slot getters
 		const char* slot_string (int slot_num);
 		double slot_double (int slot_num);
 		bool slot_bool (int slot_num);
 		std::pair<const char*, int> slot_bytes (int slot_num);
+		void* slot_foreign (int slot_num);
 
 	private:
 		struct LocalData;