diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 910de1f..fc296d3 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -4259,7 +4259,7 @@
             return( PSA_ERROR_INSUFFICIENT_STORAGE );
 
         case PSA_ITS_ERROR_INVALID_KEY:
-        case PSA_PS_ERROR_OFFSET_INVALID:
+        case PSA_ITS_ERROR_OFFSET_INVALID:
         case PSA_ITS_ERROR_INCORRECT_SIZE:
         case PSA_ITS_ERROR_BAD_POINTER:
             return( PSA_ERROR_INVALID_ARGUMENT );