lib/less/js/lib/less/tree/quoted.js in less-2.0.8 vs lib/less/js/lib/less/tree/quoted.js in less-2.0.9

@@ -18,10 +18,10 @@
         var that = this;
         var value = this.value.replace(/`([^`]+)`/g, function (_, exp) {
             return new(tree.JavaScript)(exp, that.index, true).eval(env).value;
         }).replace(/@\{([\w-]+)\}/g, function (_, name) {
             var v = new(tree.Variable)('@' + name, that.index).eval(env);
-            return v.value || v.toCSS();
+            return ('value' in v) ? v.value : v.toCSS();
         });
         return new(tree.Quoted)(this.quote + value + this.quote, value, this.escaped, this.index);
     }
 };