diff --git a/lib/model/wallet.js b/lib/model/wallet.js
index 284d829..cfeb66a 100644
--- a/lib/model/wallet.js
+++ b/lib/model/wallet.js
@@ -105,7 +105,7 @@ Wallet.prototype.addCopayer = function(copayer) {
   this._updatePublicKeyRing();
 };
 
-Wallet.prototype.updateCopayerRequestKey = function(copayerId, requestPubKey) {
+Wallet.prototype.updateCopayerRequestKey = function(copayerId, requestPubKey, signature) {
   $.checkState(this.copayers.length == this.n);
 
   var c = _.find(this.copayers, {
@@ -117,6 +117,7 @@ Wallet.prototype.updateCopayerRequestKey = function(copayerId, requestPubKey) {
 
   c.requestPubKey = requestPubKey;
   c.isTemporaryRequestKey = false;
+  c.signature = signature;
   this._updatePublicKeyRing();
 };
 
diff --git a/lib/server.js b/lib/server.js
index 61ca69d..f687839 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -211,7 +211,7 @@ WalletService.prototype.replaceTemporaryRequestKey = function(opts, cb) {
       if (wallet.copayers.length != wallet.n)
         return cb(new ClientError('WNOTFULL', 'Replace only works on full wallets'));
 
-      wallet.updateCopayerRequestKey(self.copayerId, opts.requestPubKey);
+      wallet.updateCopayerRequestKey(self.copayerId, opts.requestPubKey, opts.copayerSignature);
 
       self.storage.storeWalletAndUpdateCopayersLookup(wallet, function(err) {
         if (err) return cb(err);