diff --git a/grammars/dart.cson b/grammars/dart.cson
index 35909805..c2b25257 100644
--- a/grammars/dart.cson
+++ b/grammars/dart.cson
@@ -203,7 +203,7 @@
         'name': 'keyword.control.new.dart'
       }
       {
-        'match': '(?<!\\$)\\b(abstract|class|enum|extends|external|factory|implements|get|native|operator|set|typedef|with)\\b(?!\\$)'
+        'match': '(?<!\\$)\\b(abstract|class|enum|extends|external|factory|implements|get|mixin|native|operator|set|typedef|with)\\b(?!\\$)'
         'name': 'keyword.declaration.dart'
       }
       {