diff --git a/libs/packages/sam-formly/src/lib/formly/types/input.ts b/libs/packages/sam-formly/src/lib/formly/types/input.ts
index d717e04b7..86bc62e81 100755
--- a/libs/packages/sam-formly/src/lib/formly/types/input.ts
+++ b/libs/packages/sam-formly/src/lib/formly/types/input.ts
@@ -49,6 +49,7 @@ export class FormlyFieldInputComponent extends FieldType<FieldTypeConfig> {
   onClear() {
     this.field.formControl.setValue('');
     this.field.focus = true;
+    this.field.formControl.markAsDirty();
   }
 
   onSuffixClick(ev) {