diff --git a/lib/ace/mode/dart_highlight_rules.js b/lib/ace/mode/dart_highlight_rules.js
index e79229da..0c2795c1 100644
--- a/lib/ace/mode/dart_highlight_rules.js
+++ b/lib/ace/mode/dart_highlight_rules.js
@@ -52,7 +52,7 @@ var DartHighlightRules = function() {
         },
         {
             token: "keyword.other.import.dart",
-            regex: "#(?:\\b)(?:library|import|source|resource)(?:\\b)"
+            regex: "(?:\\b)(?:library|import|source|resource|part|part of)(?:\\b)"
         },
         {
             token : ["keyword.other.import.dart", "text"],