diff --git a/src/openforms/js/components/formio_builder/WebformBuilder.js b/src/openforms/js/components/formio_builder/WebformBuilder.js
index 88f3a4f826..fe598f4abe 100644
--- a/src/openforms/js/components/formio_builder/WebformBuilder.js
+++ b/src/openforms/js/components/formio_builder/WebformBuilder.js
@@ -58,7 +58,7 @@ class WebformBuilder extends WebformBuilderFormio {
         value = false;
       }
       component.validate = {
-        ...componentSchema.validate,
+        ...component.validate,
         required: value,
       };
     }
diff --git a/src/openforms/js/lang/formio/en.json b/src/openforms/js/lang/formio/en.json
index 2805e38d5a..eb57859e75 100644
--- a/src/openforms/js/lang/formio/en.json
+++ b/src/openforms/js/lang/formio/en.json
@@ -41,5 +41,6 @@
   "invalid_time": "Only times between {{ minTime }} and {{ maxTime }} are allowed.",
   "You must select at least {{minCount}} items.": "Ensure this field has at least {{minCount}} checked options.",
   "Empty fields": "Fields without a value",
+  "Invalid Postcode": "The submitted value does not match the postcode pattern: 1234 AB",
   "": ""
 }
diff --git a/src/openforms/js/lang/formio/nl.json b/src/openforms/js/lang/formio/nl.json
index a6c048617e..1ac69a66e3 100644
--- a/src/openforms/js/lang/formio/nl.json
+++ b/src/openforms/js/lang/formio/nl.json
@@ -360,7 +360,7 @@
   "Form fields": "Formuliervelden",
   "Presets": "Voorgedefinieerd",
   "Deprecated": "Verouderd",
-  "Invalid Postcode": "Ongeldige Postcode",
+  "Invalid Postcode": "De opgegeven waarde voldoet niet aan het postcode formaat: 1234 AB",
   "Clear on hide": "Wissen als veld verborgen is",
   "Remove the value of this field from the submission if it is hidden. Note: the value of this field is then also not used in logic rules!": "Verwijder de waarde van dit veld van de inzending als dit veld verborgen is. Let op: De waarde van dit veld wordt dan ook niet gebruikt in logica regels!",
   "Column sizes": "Grootte van de kolommen",