diff --git a/lib/ace/mode/nix_highlight_rules.js b/lib/ace/mode/nix_highlight_rules.js
index 4a8e5ebd..5cee8675 100644
--- a/lib/ace/mode/nix_highlight_rules.js
+++ b/lib/ace/mode/nix_highlight_rules.js
@@ -60,7 +60,7 @@ define(function(require, exports, module) {
                 }, {
                     regex: "}",
                     token: function(val, start, stack) {
-                        return stack[1] == "qqstring" ? "constant.language.escape" : "text"
+                        return stack[1] && stack[1].charAt(0) == "q" ? "constant.language.escape" : "text";
                     },
                     next: "pop"
                 }],