diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 7bce391..2ff168d 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -3787,6 +3787,9 @@
         .core = slot->attr
     };
 
+    if( ( status = psa_validate_tag_length( alg ) ) != PSA_SUCCESS )
+        goto exit;
+
     if( is_encrypt )
         status = psa_driver_wrapper_aead_encrypt_setup( operation,
                                                         &attributes,
@@ -3802,9 +3805,6 @@
     if( status != PSA_SUCCESS )
         goto exit;
 
-    if( ( status = psa_validate_tag_length( alg ) ) != PSA_SUCCESS )
-        goto exit;
-
     operation->key_type = psa_get_key_type( &attributes );
 
 exit: