diff --git a/lib/ace/mode/toml_highlight_rules.js b/lib/ace/mode/toml_highlight_rules.js
index 686ffae2..1a7871ab 100644
--- a/lib/ace/mode/toml_highlight_rules.js
+++ b/lib/ace/mode/toml_highlight_rules.js
@@ -57,6 +57,10 @@ var TomlHighlightRules = function() {
             regex : '"(?=.)',
             next  : "qqstring"
         },
+        {
+            token: ["variable.keygroup.toml"],
+            regex: "(?:^\\s*)(\\[\\[([^\\]]+)\\]\\])"
+        },
         {
             token: ["variable.keygroup.toml"],
             regex: "(?:^\\s*)(\\[([^\\]]+)\\])"
@@ -100,4 +104,4 @@ var TomlHighlightRules = function() {
 oop.inherits(TomlHighlightRules, TextHighlightRules);
 
 exports.TomlHighlightRules = TomlHighlightRules;
-});
\ No newline at end of file
+});