diff --git a/vault.js b/vault.js
index 4e5f3cf..3b5205b 100644
--- a/vault.js
+++ b/vault.js
@@ -39,7 +39,7 @@ export async function loginAddress(socket, chainId, address) {
         const found = []
         for( let num = 0; ; num++ ) {
             const vault = vaultAddress(chainId, address, num)
-            if(await vaults.contains(chainId, vault))
+            if(vault !== null && await vaults.contains(chainId, vault))
                 found.push(vault)
             else
                 break