diff --git a/modules/luci-base/htdocs/luci-static/resources/uci.js b/modules/luci-base/htdocs/luci-static/resources/uci.js
index e2dcdfbcf96..9047d5a7208 100644
--- a/modules/luci-base/htdocs/luci-static/resources/uci.js
+++ b/modules/luci-base/htdocs/luci-static/resources/uci.js
@@ -530,7 +530,7 @@ return baseclass.extend(/** @lends LuCI.uci.prototype */ {
 					return null;
 
 			/* check whether option was changed */
-			if (c[conf]?.[sid][opt] != null)
+			if (c[conf]?.[sid]?.[opt] != null)
 				return c[conf][sid][opt];
 
 			/* return base value */