diff --git a/client/core/src/components/textfield/textfield.js b/client/core/src/components/textfield/textfield.js
index 43a0a9bd8b..ee0a9ba7ea 100644
--- a/client/core/src/components/textfield/textfield.js
+++ b/client/core/src/components/textfield/textfield.js
@@ -15,7 +15,7 @@ export default class Textfield extends Input {
         this.hasMouseIn = false;
 
         this.input.addEventListener('keydown', () => {
-            if (!this.oldValue) {
+            if (this.oldValue === undefined) {
                 this.saveOldValue();
             }
         });