diff --git a/syntaxes/sus.tmGrammar.json b/syntaxes/sus.tmGrammar.json
index affb7a0..7c40613 100644
--- a/syntaxes/sus.tmGrammar.json
+++ b/syntaxes/sus.tmGrammar.json
@@ -12,7 +12,7 @@
 			"name": "keyword.control.untitled"
 		},
 		{
-			"match": "\\b(struct|module|interface|action|query|trigger|domain)\\b",
+			"match": "\\b(struct|module|interface|action|query|trigger|domain|extern|__builtin__)\\b",
 			"name": "keyword.control.untitled"
 		},
 		{