diff --git a/packages/expect/src/index.ts b/packages/expect/src/index.ts
index 648074fdba90..75ab9ba9d18d 100644
--- a/packages/expect/src/index.ts
+++ b/packages/expect/src/index.ts
@@ -431,7 +431,7 @@ const expectExport = expect as Expect;
 
 declare namespace expectExport {
   export type MatcherState = JestMatcherState;
-  export interface Matchers<R, T> extends MatcherInterface<R, T> {}
+  export interface Matchers<R, T = unknown> extends MatcherInterface<R, T> {}
 }
 
 export = expectExport;