diff --git a/app/services/post_alerter.rb b/app/services/post_alerter.rb
index 3fe1a8899a7c26..bcf1f0538511e4 100644
--- a/app/services/post_alerter.rb
+++ b/app/services/post_alerter.rb
@@ -453,7 +453,7 @@ def push_notification(user, payload)
     if SiteSetting.allow_user_api_key_scopes.split("|").include?("push") && SiteSetting.allowed_user_api_push_urls.present?
       clients = user.user_api_keys
         .where("('push' = ANY(scopes) OR 'notifications' = ANY(scopes))")
-        .where("push_url IS NOT NULL")
+        .where("push_url IS NOT NULL AND push_url <> ''")
         .where("position(push_url IN ?) > 0", SiteSetting.allowed_user_api_push_urls)
         .where("revoked_at IS NULL")
         .pluck(:client_id, :push_url)