diff --git a/source/parser/types.civet b/source/parser/types.civet
index b6f01feb..e860a68b 100644
--- a/source/parser/types.civet
+++ b/source/parser/types.civet
@@ -440,7 +440,7 @@ export type ForDeclaration
 
 export type ForReduction
   type: "ForReduction"
-  subtype: "some" | "every" | "count" | "find" | "sum" | "product" | "min" | "max" | "first" | "concat"
+  subtype: "some" | "every" | "count" | "first" | "sum" | "product" | "min" | "max" | "join" | "concat"
 
 export type SwitchStatement
   type: "SwitchStatement"