diff --git a/src/routes/dataset/meta-form/UnifiedSizeChoice.svelte b/src/routes/dataset/meta-form/UnifiedSizeChoice.svelte
index 736ba73..dfe7db6 100644
--- a/src/routes/dataset/meta-form/UnifiedSizeChoice.svelte
+++ b/src/routes/dataset/meta-form/UnifiedSizeChoice.svelte
@@ -70,6 +70,7 @@ async function saveUnifiedRatio() {
       type="checkbox"
       bind:checked={unifiedRatio}
       onchange={saveUnifiedRatio}
+      disabled={!unifiedSize}
       class="checkbox" />
     Unified Ratio
   </label>