diff --git a/js/libtextsecure.js b/js/libtextsecure.js
index 7083996d..8c33acbd 100644
--- a/js/libtextsecure.js
+++ b/js/libtextsecure.js
@@ -37889,7 +37889,7 @@ var TextSecureServer = (function() {
                     data        : encryptedBin,
                     processData : false,
                 }).then(function() {
-                    return match[1];
+                    return response.idString;
                 }.bind(this));
             }.bind(this));
         },
diff --git a/libtextsecure/api.js b/libtextsecure/api.js
index 01634d7f..9609fc6a 100644
--- a/libtextsecure/api.js
+++ b/libtextsecure/api.js
@@ -391,7 +391,7 @@ var TextSecureServer = (function() {
                     data        : encryptedBin,
                     processData : false,
                 }).then(function() {
-                    return match[1];
+                    return response.idString;
                 }.bind(this));
             }.bind(this));
         },