diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 79b2618..c2b318c 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -3517,7 +3517,7 @@
     }
 
     required_nonce_size = PSA_AEAD_NONCE_LENGTH( operation->key_type,
-                                                operation->alg );
+                                                 operation->alg );
     if( nonce_size < required_nonce_size )
     {
         status = PSA_ERROR_BUFFER_TOO_SMALL;