diff --git a/passes/pmgen/peepopt_muxadd.pmg b/passes/pmgen/peepopt_muxadd.pmg
index c403ce75f..44fac9a3b 100644
--- a/passes/pmgen/peepopt_muxadd.pmg
+++ b/passes/pmgen/peepopt_muxadd.pmg
@@ -103,7 +103,7 @@ code add_y add_a add_b add_a_ext add_a_id add_b_id  mux_y mux_a mux_b mux_a_id m
 	}
 
 	// Create new mid wire
-	mid = module->addWire(NEW_ID, GetSize(add_b));
+	mid = module->addWire(NEW_ID2_SUFFIX("mid"), GetSize(add_b));
 
 	// Connect ports
 	add->setPort(add_b_id, mid);