diff --git a/js/components/text_input.js b/js/components/text_input.js
index 962fcabf..92c8c7e4 100644
--- a/js/components/text_input.js
+++ b/js/components/text_input.js
@@ -102,6 +102,8 @@ export default {
     onBlur: function(e) {
       if (!(this.optional && e.target.value === '')) {
         this._checkIfValid({ value: e.target.value.trim(), invalidate: true })
+      } else if (this.modified && !this.optional) {
+        this._checkIfValid({ value: e.target.value.trim(), invalidate: true })
       }
       this.value = e.target.value.trim()