diff --git a/app/javascript/submission_form/area.vue b/app/javascript/submission_form/area.vue
index e363e800..004aeb39 100644
--- a/app/javascript/submission_form/area.vue
+++ b/app/javascript/submission_form/area.vue
@@ -97,11 +97,11 @@
:value="false"
class="aspect-square base-radio"
:class="{ '!w-auto !h-full': area.w > area.h, '!w-full !h-auto': area.w <= area.h }"
- :checked="modelValue && modelValue === field.options.find((o) => o.uuid === area.option_uuid)?.value"
+ :checked="!!modelValue && modelValue === field.options.find((o) => o.uuid === area.option_uuid)?.value"
@click="$emit('update:model-value', field.options.find((o) => o.uuid === area.option_uuid)?.value)"
>