diff --git a/src/js/rulesAssistantOptions.js b/src/js/rulesAssistantOptions.js
index 8acf02837547862b4500807314d348bf61a6e5ac..b986d9b41b0b2cf975066e846ff1c7cb6d41e051 100644
--- a/src/js/rulesAssistantOptions.js
+++ b/src/js/rulesAssistantOptions.js
@@ -571,7 +571,10 @@ globalThis.rulesAssistantOptions = (function() {
 		}
 
 		setValue(what) {
-			this.radios_.get(what === null ? noDefaultSetting.value : what).checked = true;
+			const option = this.radios_.get(what === null ? noDefaultSetting.value : what);
+			if (option) {
+				option.checked = true;
+			}
 		}
 
 		inputEdited() {