diff --git a/src/function.rs b/src/function.rs
index f9028912..c3d7409d 100644
--- a/src/function.rs
+++ b/src/function.rs
@@ -63,6 +63,8 @@ macro_rules! py_fn {
             ml_doc: 0 as *const $crate::_detail::libc::c_char
         };
         unsafe {
+            [ method_def_ $f ].ml_name =
+                concat!(stringify!($f), "\0").as_ptr() as *const _;
             $crate::_detail::py_fn_impl(&mut [ method_def_ $f ])
         }
     }})
diff --git a/src/rustobject/method.rs b/src/rustobject/method.rs
index aba81775..9894f953 100644
--- a/src/rustobject/method.rs
+++ b/src/rustobject/method.rs
@@ -86,12 +86,16 @@ macro_rules! py_method {
         }
         static mut [ method_def_ $f ]: $crate::_detail::ffi::PyMethodDef = $crate::_detail::ffi::PyMethodDef {
             //ml_name: bytes!(stringify!($f), "\0"),
-            ml_name: b"<rust method>\0" as *const u8 as *const $crate::_detail::libc::c_char,
+            ml_name: 0 as *const $crate::_detail::libc::c_char,
             ml_meth: Some([ wrap_ $f ]),
             ml_flags: $crate::_detail::ffi::METH_VARARGS,
             ml_doc: 0 as *const $crate::_detail::libc::c_char
         };
-        unsafe { $crate::_detail::py_method_impl(&mut [ method_def_ $f ], $f) }
+        unsafe {
+            [ method_def_ $f ].ml_name =
+                concat!(stringify!($f), "\0").as_ptr() as *const _;
+            $crate::_detail::py_method_impl(&mut [ method_def_ $f ], $f)
+        }
     }})
 }