diff --git a/modules/luci-base/htdocs/luci-static/resources/form.js b/modules/luci-base/htdocs/luci-static/resources/form.js
index 58a31dddb2..f7b4c64f8f 100644
--- a/modules/luci-base/htdocs/luci-static/resources/form.js
+++ b/modules/luci-base/htdocs/luci-static/resources/form.js
@@ -1862,6 +1862,9 @@ var CBIAbstractValue = CBIAbstractElement.extend(/** @lends LuCI.form.AbstractVa
 		if (cval == null)
 			cval = this.default;
 
+		if (Array.isArray(cval))
+			cval = cval.join(' ');
+
 		return (cval != null) ? '%h'.format(cval) : null;
 	},