diff --git a/src/dotnet/ManagedMemberInspector.ts b/src/dotnet/ManagedMemberInspector.ts
index 971b334f69..2437ca9557 100644
--- a/src/dotnet/ManagedMemberInspector.ts
+++ b/src/dotnet/ManagedMemberInspector.ts
@@ -123,7 +123,7 @@ const readMemberLayout = (bytes: Buffer, pe: ManagedPeLayout) => {
 };
 
 const selectTypes = (
-  types: ManagedMemberInspection["types"],
+  types: readonly ManagedMemberInspection["types"][number][],
   typeNames: readonly string[] | undefined,
 ): {
   readonly tokens: SelectedTypeTokens;