diff --git a/src/backups.js b/src/backups.js
index 12fc4bd20..b2ec9f0aa 100644
--- a/src/backups.js
+++ b/src/backups.js
@@ -168,7 +168,7 @@ function getRestoreUrl(backupId, callback) {
             if (error) return callback(new BackupsError(BackupsError.INTERNAL_ERROR, error));
 
             var backupConfig = result.config;
-            api(backupConfig.provider).getSignedDownloadUrl(apiConfig, backupConfig, function (error, result) {
+            api(backupConfig.provider).getSignedDownloadUrl(apiConfig, backupConfig, backupId, function (error, result) {
                 if (error) return callback(error);
 
                 var obj = {
diff --git a/src/storage/caas.js b/src/storage/caas.js
index 38d4762fb..8056bf0bc 100644
--- a/src/storage/caas.js
+++ b/src/storage/caas.js
@@ -79,9 +79,10 @@ function getSignedUploadUrl(apiConfig, filename, callback) {
     });
 }
 
-function getSignedDownloadUrl(apiConfig, info, callback) {
+function getSignedDownloadUrl(apiConfig, info, filename, callback) {
     assert.strictEqual(typeof apiConfig, 'object');
     assert.strictEqual(typeof info, 'object');
+    assert.strictEqual(typeof filename, 'string');
     assert.strictEqual(typeof callback, 'function');
 
     if (!info.bucket || !info.prefix) return new Error('Invalid configuration'); // prevent error in s3
@@ -93,7 +94,7 @@ function getSignedDownloadUrl(apiConfig, info, callback) {
 
         var params = {
             Bucket: info.bucket,
-            Key: info.prefix + '/' + info.filename,
+            Key: info.prefix + '/' + filename,
             Expires: 60 * 30 /* 30 minutes */
         };
 
diff --git a/src/storage/s3.js b/src/storage/s3.js
index 235128d02..08c2a48fc 100644
--- a/src/storage/s3.js
+++ b/src/storage/s3.js
@@ -85,9 +85,10 @@ function getSignedUploadUrl(apiConfig, filename, callback) {
     });
 }
 
-function getSignedDownloadUrl(apiConfig, info, callback) {
+function getSignedDownloadUrl(apiConfig, info, filename, callback) {
     assert.strictEqual(typeof apiConfig, 'object');
     assert.strictEqual(typeof info, 'object');
+    assert.strictEqual(typeof filename, 'string');
     assert.strictEqual(typeof callback, 'function');
 
     getBackupCredentials(apiConfig, function (error, credentials) {
@@ -97,7 +98,7 @@ function getSignedDownloadUrl(apiConfig, info, callback) {
 
         var params = {
             Bucket: info.bucket,
-            Key: info.prefix + '/' + info.filename,
+            Key: info.prefix + '/' + filename,
             Expires: 60 * 30 /* 30 minutes */
         };