diff --git a/app/assets/javascripts/discourse/components/global-notice.js.es6 b/app/assets/javascripts/discourse/components/global-notice.js.es6
index 327f6aa79a..5041da1713 100644
--- a/app/assets/javascripts/discourse/components/global-notice.js.es6
+++ b/app/assets/javascripts/discourse/components/global-notice.js.es6
@@ -11,7 +11,7 @@ export default Ember.Component.extend(
       let notices = [];
 
       if ($.cookie("dosp") === "1") {
-        $.cookie("dosp", null, { path: "/" });
+        $.removeCookie("dosp", { path: "/" });
         notices.push([I18n.t("forced_anonymous"), "forced-anonymous"]);
       }
 
diff --git a/app/assets/javascripts/discourse/controllers/create-account.js.es6 b/app/assets/javascripts/discourse/controllers/create-account.js.es6
index 22848d8a2f..c4f1b20fc5 100644
--- a/app/assets/javascripts/discourse/controllers/create-account.js.es6
+++ b/app/assets/javascripts/discourse/controllers/create-account.js.es6
@@ -260,12 +260,12 @@ export default Ember.Controller.extend(
                 this.get("rejectedPasswords").pushObject(attrs.accountPassword);
               }
               this.set("formSubmitted", false);
-              $.cookie("destination_url", null);
+              $.removeCookie("destination_url");
             }
           },
           () => {
             this.set("formSubmitted", false);
-            $.cookie("destination_url", null);
+            $.removeCookie("destination_url");
             return this.flash(I18n.t("create_account.failed"), "error");
           }
         );
diff --git a/app/assets/javascripts/discourse/controllers/login.js.es6 b/app/assets/javascripts/discourse/controllers/login.js.es6
index 7d10818420..c3aecebae0 100644
--- a/app/assets/javascripts/discourse/controllers/login.js.es6
+++ b/app/assets/javascripts/discourse/controllers/login.js.es6
@@ -158,12 +158,12 @@ export default Ember.Controller.extend(ModalFunctionality, {
               .val(self.get("loginPassword"));
 
             if (ssoDestinationUrl) {
-              $.cookie("sso_destination_url", null);
+              $.removeCookie("sso_destination_url");
               window.location.assign(ssoDestinationUrl);
               return;
             } else if (destinationUrl) {
               // redirect client to the original URL
-              $.cookie("destination_url", null);
+              $.removeCookie("destination_url");
               $hidden_login_form
                 .find("input[name=redirect]")
                 .val(destinationUrl);
diff --git a/app/assets/javascripts/discourse/lib/theme-selector.js.es6 b/app/assets/javascripts/discourse/lib/theme-selector.js.es6
index ce806b4496..69a2eeb935 100644
--- a/app/assets/javascripts/discourse/lib/theme-selector.js.es6
+++ b/app/assets/javascripts/discourse/lib/theme-selector.js.es6
@@ -38,7 +38,7 @@ export function setLocalTheme(ids, themeSeq) {
       expires: 9999
     });
   } else {
-    $.cookie("theme_ids", null, { path: "/", expires: 1 });
+    $.removeCookie("theme_ids", { path: "/", expires: 1 });
   }
 }