diff --git a/webui/static/script.js b/webui/static/script.js
index 804d3999..5352e8be 100644
--- a/webui/static/script.js
+++ b/webui/static/script.js
@@ -1677,7 +1677,7 @@ function collectQualityProfileFromUI() {
         version: 1,
         preset: 'custom', // Will be overridden if a preset is active
         qualities: {},
-        fallback_enabled: document.getElementById('quality-fallback-enabled')?.checked || true
+        fallback_enabled: document.getElementById('quality-fallback-enabled')?.checked ?? true
     };
 
     const qualities = ['flac', 'mp3_320', 'mp3_256', 'mp3_192'];