diff --git a/client/declarations/exports.d.ts b/client/declarations/exports.d.ts
deleted file mode 100644
index 58d33e07..00000000
--- a/client/declarations/exports.d.ts
+++ /dev/null
@@ -1,8 +0,0 @@
-
-/* File: client/js/teaforo.ts */
-declare namespace forum {
-    export function register_callback(callback: () => any);
-    export function open();
-    export function logout();
-    export function sync_main();
-}
diff --git a/tools/dtsgen/test/test_o6.ts b/tools/dtsgen/test/test_o6.ts
new file mode 100644
index 00000000..84487dc1
--- /dev/null
+++ b/tools/dtsgen/test/test_o6.ts
@@ -0,0 +1,19 @@
+function f() {
+    console.log("f(): evaluated");
+    return function (target, propertyKey: string, descriptor: PropertyDescriptor) {
+        console.log("f(): called");
+    }
+}
+
+function g() {
+    console.log("g(): evaluated");
+    return function (target, propertyKey: string, descriptor: PropertyDescriptor) {
+        console.log("g(): called");
+    }
+}
+
+class C {
+    @f()
+    @g()
+    method() {}
+}
\ No newline at end of file