diff --git a/mobile/android/components/PromptService.js b/mobile/android/components/PromptService.js
index 99e6f3d32f7f..798cc5f3769c 100644
--- a/mobile/android/components/PromptService.js
+++ b/mobile/android/components/PromptService.js
@@ -394,11 +394,12 @@ InternalPrompt.prototype = {
       [checkMsg, check] = PromptUtils.getUsernameAndPassword(foundLogins, aUser, aPass);
     }
 
+    // (eslint-disable: see bug 1177904)
     let ok = false;
     if (aUser)
-      ok = this.nsIPrompt_promptUsernameAndPassword(aTitle, aText, aUser, aPass, checkMsg, check);
+      ok = this.nsIPrompt_promptUsernameAndPassword(aTitle, aText, aUser, aPass, checkMsg, check); // eslint-disable-line no-undef
     else
-      ok = this.nsIPrompt_promptPassword(aTitle, aText, aPass, checkMsg, check);
+      ok = this.nsIPrompt_promptPassword(aTitle, aText, aPass, checkMsg, check); // eslint-disable-line no-undef
 
     if (ok && canSave && check.value)
       PromptUtils.savePassword(hostname, realm, aUser, aPass);