diff --git a/README.md b/README.md
index 1ce5d47ea..5cc52e842 100644
--- a/README.md
+++ b/README.md
@@ -364,16 +364,16 @@ Verilog Attributes and non-standard features
   it as the external-facing pin of an I/O pad, and prevents ``iopadmap``
   from inserting another pad cell on it.
 
-- The module attribute ``abc_box_id`` specifies a positive integer linking a
+- The module attribute ``abc9_box_id`` specifies a positive integer linking a
   blackbox or whitebox definition to a corresponding entry in a `abc9`
   box-file.
 
-- The port attribute ``abc_carry`` marks the carry-in (if an input port) and
+- The port attribute ``abc9_carry`` marks the carry-in (if an input port) and
   carry-out (if output port) ports of a box. This information is necessary for
   `abc9` to preserve the integrity of carry-chains. Specifying this attribute
   onto a bus port will affect only its most significant bit.
 
-- The port attribute ``abc_arrival`` specifies an integer (for output ports
+- The port attribute ``abc9_arrival`` specifies an integer (for output ports
   only) to be used as the arrival time of this sequential port. It can be used,
   for example, to specify the clk-to-Q delay of a flip-flop for consideration
   during techmapping.