diff --git a/src/silx/utils/proxy.py b/src/silx/utils/proxy.py
index 04a6a0678f..5d5cebf2c3 100644
--- a/src/silx/utils/proxy.py
+++ b/src/silx/utils/proxy.py
@@ -182,7 +182,7 @@ def _docstring(dest, origin):
         except AttributeError:
             raise ValueError("origin class has no %s method" % dest.__name__)
 
-    dest.__doc__ = origin.__doc__
+    functools.update_wrapper(dest, origin)
     return dest
 
 
diff --git a/src/silx/utils/test/test_proxy.py b/src/silx/utils/test/test_proxy.py
index 6855098078..94459f89bf 100644
--- a/src/silx/utils/test/test_proxy.py
+++ b/src/silx/utils/test/test_proxy.py
@@ -322,3 +322,16 @@ def g():
             pass
 
         self.assertEqual(f.__doc__, g.__doc__)
+
+    def test_typed_function(self):
+        def f(a: int) -> float:
+            """Docstring"""
+            pass
+
+        @docstring(f)
+        def g():
+            pass
+
+        self.assertEqual(f.__doc__, g.__doc__)
+        self.assertEqual(g.__annotations__["a"], int)
+        self.assertEqual(g.__annotations__["return"], float)