diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 9e1086a98e545..3b1ad837a79de 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -1746,6 +1746,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
         getVoidType: () => voidType,
         getUndefinedType: () => undefinedType,
         getNullType: () => nullType,
+        getUnknownType: () => unknownType,
         getESSymbolType: () => esSymbolType,
         getNeverType: () => neverType,
         getOptionalType: () => optionalType,
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 6b7548280c60f..f56394a3a4523 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -5142,6 +5142,7 @@ export interface TypeChecker {
      * is `null`. Instead, use `type.flags & TypeFlags.Null`.
      */
     getNullType(): Type;
+    getUnknownType(): Type;
     getESSymbolType(): Type;
     /**
      * Gets the intrinsic `never` type. There are multiple types that act as `never` used internally in the compiler,