diff --git a/lib/handlers/on-search.js b/lib/handlers/on-search.js
index 8e7dd34a..1a97422a 100644
--- a/lib/handlers/on-search.js
+++ b/lib/handlers/on-search.js
@@ -244,7 +244,7 @@ module.exports = server => (mailbox, options, session, callback) => {
                             }
                             break;
 
-                        case 'headerdate':
+                        case 'date':
                             {
                                 let op = false;
                                 let value = new Date(term.value + ' GMT');