diff --git a/lib/less/parser.js b/lib/less/parser.js
index 2a61d7c5..59fb6fa3 100644
--- a/lib/less/parser.js
+++ b/lib/less/parser.js
@@ -411,8 +411,7 @@ less.parser = {
             var name, value, match;
 
             if (name = $(this.property) || $(this.entities.variable, true)) {
-                if ((name[0] != '@') && (match =
-                        peek(/((?:[\s\w."']|-[a-z])+|[^@+\/*(;{}-]*)[;][\s\n]*/g))) {
+                if ((name[0] != '@') && (match = peek(/([^@+\/*(;{}-]*)[;][\s\n]*/g))) {
                     i += match[0].length;
                     return new(tree.Rule)(name, match[1]);
                 } else if ((value = $(this.value)) && ($(';') || peek(/\}/g))) {