diff --git a/src/app/docs/o-toggle.component.md b/src/app/docs/o-toggle.component.md
index f32ce6ce..4f483e9a 100644
--- a/src/app/docs/o-toggle.component.md
+++ b/src/app/docs/o-toggle.component.md
@@ -1 +1,4 @@
-This 3-way toggle example uses `ngbRadioGroup` directive. Check out ng-bootstrap [documentation](https://ng-bootstrap.github.io/#/components/buttons) for more information.
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+This 3-way toggle example uses `ngbRadioGroup` directive. Check out ng-bootstrap [documentation](https://ng-bootstrap.github.io/#/components/buttons) for more information.
+
+Please import FormsModule to use ngModel : `import { FormsModule } from '@angular/forms';`
+ 
\ No newline at end of file