diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 927720e580da8..5e44aac6dd25f 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -858,7 +858,7 @@ export const enum ModifierFlags {
     Protected =          1 << 2,  // Property/Method
     Readonly =           1 << 3,  // Property/Method
     Override =           1 << 4,  // Override method.
-    
+
     // Syntactic-only modifiers
     Export =             1 << 5,  // Declarations
     Abstract =           1 << 6,  // Class/Method/ConstructSignature
@@ -3663,10 +3663,10 @@ export interface ImportClause extends NamedDeclaration {
 export type AssertionKey = ImportAttributeName;
 
 /** @deprecated */
-export type AssertEntry = ImportAttribute;
+export interface AssertEntry extends ImportAttribute {}
 
 /** @deprecated */
-export type AssertClause = ImportAttributes;
+export interface AssertClause extends ImportAttributes {}
 
 export type ImportAttributeName = Identifier | StringLiteral;
 
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index 5ee1d5258cb01..f9df3aaa3d430 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -6018,9 +6018,11 @@ declare namespace ts {
     /** @deprecated */
     type AssertionKey = ImportAttributeName;
     /** @deprecated */
-    type AssertEntry = ImportAttribute;
+    interface AssertEntry extends ImportAttribute {
+    }
     /** @deprecated */
-    type AssertClause = ImportAttributes;
+    interface AssertClause extends ImportAttributes {
+    }
     type ImportAttributeName = Identifier | StringLiteral;
     interface ImportAttribute extends Node {
         readonly kind: SyntaxKind.ImportAttribute;