diff --git a/.github/actions/spelling/allow.txt b/.github/actions/spelling/allow.txt
index 959da54607..421d6e4c46 100644
--- a/.github/actions/spelling/allow.txt
+++ b/.github/actions/spelling/allow.txt
@@ -179,6 +179,7 @@ HYDCAR
 HYPOT
 Hennart
 Himmelblau
+IABS
 IBDSAV
 IBRNCH
 ICONT