diff --git a/src/smolarith/mul.py b/src/smolarith/mul.py
index 4d82c25..3c5b3d9 100644
--- a/src/smolarith/mul.py
+++ b/src/smolarith/mul.py
@@ -156,27 +156,22 @@ def multiplier_input_signature(width):
         following attributes:
 
         .. attribute:: .data
-            :type: Inputs
+            :type: Out(Inputs)
             :noindex:
 
-            Flow :data:`~amaranth:amaranth.lib.wiring.Out`. Data input to
-            multiplier.
+            Data input to multiplier.
 
         .. attribute:: .rdy
-            :type: Signal
+            :type: In(1)
             :noindex:
 
-            Shape :data:`~amaranth:amaranth.hdl.unsigned`, flow
-            :data:`~amaranth:amaranth.lib.wiring.In`. When ``1``, indicates
-            that multiplier is ready.
+            When ``1``, indicates that multiplier is ready.
 
         .. attribute:: .valid
-            :type: Signal
+            :type: In(1)
             :noindex:
 
-            Shape :data:`~amaranth:amaranth.hdl.unsigned`, flow
-            :data:`~amaranth:amaranth.lib.wiring.Out`. When ``1``, indicates
-            that multiplier data input is valid.
+            When ``1``, indicates that multiplier data input is valid.
     """
     return Signature({
         "data": Out(Inputs(width)),