diff --git a/migen/fhdl/structure.py b/migen/fhdl/structure.py
index 4c0ef34bf..ce17be221 100644
--- a/migen/fhdl/structure.py
+++ b/migen/fhdl/structure.py
@@ -216,7 +216,7 @@ class Instance:
 			if isinstance(x[1], Signal):
 				return x # override
 			elif isinstance(x[1], BV):
-				return (x[0], Signal(x[1], self.name_override + "_" + x[0]))
+				return (x[0], Signal(x[1], x[0]))
 			else:
 				raise TypeError
 		self.outs = dict(map(process_io, outs))