diff --git a/ts/deck-options/FsrsOptions.svelte b/ts/deck-options/FsrsOptions.svelte
index d1b9e69e8..00dc00e30 100644
--- a/ts/deck-options/FsrsOptions.svelte
+++ b/ts/deck-options/FsrsOptions.svelte
@@ -357,7 +357,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
         {#if optimalRetention}
             {estimatedRetention(optimalRetention)}
-            {#if optimalRetention > $config.desiredRetention}
+            {#if parseFloat(optimalRetention.toFixed(2)) > $config.desiredRetention}
                 <Warning
                     warning="Your desired retention is below optimal. Increasing it is recommended."
                     className="alert-warning"