diff --git a/readmeaig b/readmeaig
index 5dd81a0f9..1f77159c6 100644
--- a/readmeaig
+++ b/readmeaig
@@ -5,13 +5,13 @@ Using AIG Package in ABC
 - Link the library to the project.
 - Add #include "saig.h".
 - Start the AIG package using Aig_ManStart().
-- Assign primary inputs using Aig_ObjCreatePi().
-- Assign register outputs using Aig_ObjCreatePi().
+- Assign primary inputs using Aig_ObjCreateCi().
+- Assign register outputs using Aig_ObjCreateCi().
 (it is important to create all PIs first, before creating register outputs).
 - Construct AIG in the topological order using Aig_And(), Aig_Or(), Aig_Not(), etc.
 - If constant-0/1 AIG nodes are needed, use Aig_ManConst0() or Aig_ManConst1()
-- Create primary outputs using Aig_ObjCreatePo().
-- Create register inputs using Aig_ObjCreatePo().
+- Create primary outputs using Aig_ObjCreateCo().
+- Create register inputs using Aig_ObjCreateCo().
 (it is important to create all POs first, before creating register inputs).
 - Set the number of registers by calling Aig_ManSetRegNum().
 - Remove dangling AIG nodes (produced by structural hashing) using Aig_ManCleanup().