diff --git a/TypeScript.YAML-tmLanguage b/TypeScript.YAML-tmLanguage
index 9638a98d..8053ed6c 100644
--- a/TypeScript.YAML-tmLanguage
+++ b/TypeScript.YAML-tmLanguage
@@ -307,7 +307,7 @@ repository:
   type-annotation:
     name: meta.type.annotation.ts
     begin: ":"
-    end: (?=$|[,);\}\]]|//)|(?==[^>])|(?<=[\}>\]\)]|[a-zA-Z_$])\s*(?=\{)
+    end: (?=$|[,);\}\]]|//)|(?==[^>])|(?<=[\}>\]\)]|[a-zA-Z0-9_$])\s*(?=\{)
     patterns:
     - include: '#expression-operator'
     - include: '#type'