diff --git a/sphinx_js/typedoc.py b/sphinx_js/typedoc.py
index e134107f..166c3a98 100644
--- a/sphinx_js/typedoc.py
+++ b/sphinx_js/typedoc.py
@@ -868,7 +868,7 @@ def inner(param: Param) -> Iterator[str | ir.TypeXRef]:
 
         yield from riffle((inner(param) for param in self.parameters), ", ")
 
-        yield "): "
+        yield ") => "
         return_type = self.return_type(converter)
         if return_type:
             ret = return_type[0].type
diff --git a/tests/test_typedoc_analysis/test_typedoc_analysis.py b/tests/test_typedoc_analysis/test_typedoc_analysis.py
index 8e16a7b6..0b10521c 100644
--- a/tests/test_typedoc_analysis/test_typedoc_analysis.py
+++ b/tests/test_typedoc_analysis/test_typedoc_analysis.py
@@ -560,9 +560,9 @@ def test_constrained_by_constructor(self):
         """Make sure ``new ()`` expressions and, more generally, per-property
         constraints are rendered properly."""
         obj = self.analyzer.get_object(["create1"])
-        assert join_type(obj.params[0].type) == "{new (x: number): A}"
+        assert join_type(obj.params[0].type) == "{new (x: number) => A}"
         obj = self.analyzer.get_object(["create2"])
-        assert join_type(obj.params[0].type) == "{new (): T}"
+        assert join_type(obj.params[0].type) == "{new () => T}"
 
     def test_utility_types(self):
         """Test that a representative one of TS's utility types renders."""
@@ -619,4 +619,4 @@ def test_destructured(self):
     def test_funcarg(self):
         obj = self.analyzer.get_object(["funcArg"])
         assert obj.params[0].name == "a"
-        assert join_type(obj.params[0].type) == "(b: number, c: number): number"
+        assert join_type(obj.params[0].type) == "(b: number, c: number) => number"