diff --git a/security/manager/pki/resources/content/downloadcert.js b/security/manager/pki/resources/content/downloadcert.js
index 39ebaeca0016..60f102eb3065 100644
--- a/security/manager/pki/resources/content/downloadcert.js
+++ b/security/manager/pki/resources/content/downloadcert.js
@@ -33,6 +33,9 @@ function onLoad()
 
   var bundle = srGetStrBundle("chrome://pippki/locale/pippki.properties");
 
+  if (!caName.length)
+    caName = bundle.GetStringFromName("unnamedCA");
+
   var message2 = bundle.formatStringFromName("newCAMessage1",
                                              [ caName ],
                                               1);
diff --git a/security/manager/pki/resources/locale/en-US/pippki.properties b/security/manager/pki/resources/locale/en-US/pippki.properties
index c15304065446..11bfc8deca1c 100644
--- a/security/manager/pki/resources/locale/en-US/pippki.properties
+++ b/security/manager/pki/resources/locale/en-US/pippki.properties
@@ -25,6 +25,7 @@ CertPassPrompt=Please enter the Personal Security Password for the PSM Private K
 #These are for dialogs
 #Download Cert dialog
 newCAMessage1=Do you want to trust "%S" for the following purposes?
+unnamedCA=Certificate Authority (unnamed)
 
 #For editing cert trust
 editTrustWindowTitle=Edit certificate trust