diff --git a/js/libtextsecure.js b/js/libtextsecure.js
index 4fafa536..c31aa8c2 100644
--- a/js/libtextsecure.js
+++ b/js/libtextsecure.js
@@ -37119,7 +37119,7 @@ MessageReceiver.prototype.extend({
 
             return p.then(function() {
                 return this.processDecrypted(finalMessage);
-            });
+            }.bind(this);
         }.bind(this));
     },
     handleEndSession: function(number) {
diff --git a/libtextsecure/message_receiver.js b/libtextsecure/message_receiver.js
index 421811e8..884cf40a 100644
--- a/libtextsecure/message_receiver.js
+++ b/libtextsecure/message_receiver.js
@@ -299,7 +299,7 @@ MessageReceiver.prototype.extend({
 
             return p.then(function() {
                 return this.processDecrypted(finalMessage);
-            });
+            }.bind(this);
         }.bind(this));
     },
     handleEndSession: function(number) {