diff --git a/src/mint-lib/test_mint_api.c b/src/mint-lib/test_mint_api.c
index 812ad27e0..32bcac5f9 100644
--- a/src/mint-lib/test_mint_api.c
+++ b/src/mint-lib/test_mint_api.c
@@ -699,7 +699,7 @@ interpreter_run (void *cls,
     GNUNET_CRYPTO_eddsa_key_get_public (&cmd->details.withdraw_sign.coin_priv.eddsa_priv,
                                         &coin_pub.eddsa_pub);
     cmd->details.withdraw_sign.blinding_key.rsa_blinding_key
-      = GNUNET_CRYPTO_rsa_blinding_key_create (1024); // FIXME: GNUNET_CRYPTO_rsa_public_key_len (cmd->details.withdraw_sign.pk->key.rsa_public_key));
+      = GNUNET_CRYPTO_rsa_blinding_key_create (GNUNET_CRYPTO_rsa_public_key_len (cmd->details.withdraw_sign.pk->key.rsa_public_key));
 
     cmd->details.withdraw_sign.wsh
       = TALER_MINT_withdraw_sign (mint,