diff --git a/crates/oxc_parser/src/diagnostics.rs b/crates/oxc_parser/src/diagnostics.rs
index 94525532c28e7..10b132267050e 100644
--- a/crates/oxc_parser/src/diagnostics.rs
+++ b/crates/oxc_parser/src/diagnostics.rs
@@ -1086,7 +1086,7 @@ pub fn decorator_on_overload(span: Span) -> OxcDiagnostic {
 
 #[cold]
 pub fn as_in_ts(span: Span) -> OxcDiagnostic {
-    ts_error("8037", "Type assertion expressions can only be used in TypeScript files.")
+    ts_error("8016", "Type assertion expressions can only be used in TypeScript files.")
         .with_label(span)
 }
 
diff --git a/tasks/coverage/snapshots/parser_misc.snap b/tasks/coverage/snapshots/parser_misc.snap
index 5ffb312ff62fa..1553977ab4539 100644
--- a/tasks/coverage/snapshots/parser_misc.snap
+++ b/tasks/coverage/snapshots/parser_misc.snap
@@ -3646,7 +3646,7 @@ Negative Passed: 134/134 (100.00%)
    ╰────
   help: No modifiers are allowed here.
 
-  × TS(8037): Type assertion expressions can only be used in TypeScript files.
+  × TS(8016): Type assertion expressions can only be used in TypeScript files.
    ╭─[misc/fail/oxc-4111-1.js:1:1]
  1 │ funtransientction as longciiConÞr>ol(cde) {
    · ─────────────────────────────────
diff --git a/tasks/coverage/snapshots/parser_typescript.snap b/tasks/coverage/snapshots/parser_typescript.snap
index b439957d0e5e5..762d746869f6c 100644
--- a/tasks/coverage/snapshots/parser_typescript.snap
+++ b/tasks/coverage/snapshots/parser_typescript.snap
@@ -7443,7 +7443,7 @@ Expect to Parse: tasks/coverage/typescript/tests/cases/conformance/parser/ecmasc
  2 │ Foo<number>(1);
    ╰────
 
-  × TS(8037): Type assertion expressions can only be used in TypeScript files.
+  × TS(8016): Type assertion expressions can only be used in TypeScript files.
    ╭─[typescript/tests/cases/compiler/jsFileCompilationTypeAssertions.ts:1:1]
  1 │ 0 as number;
    · ───────────