diff --git a/EIPS/eip-663.md b/EIPS/eip-663.md
index e82f9629135fb..116f8f620b324 100644
--- a/EIPS/eip-663.md
+++ b/EIPS/eip-663.md
@@ -29,7 +29,7 @@ Introducing `SWAPN`, `DUPN` and `EXCHANGE` will provide an option to compilers t
 
 ## Specification
 
-We introduce two new instructions:
+We introduce three new instructions:
 
 1. `DUPN` (`0xe6`)
 2. `SWAPN` (`0xe7`)