diff --git a/src/core/watchQueryOptions.ts b/src/core/watchQueryOptions.ts
index d37df460124..560ad010e2e 100644
--- a/src/core/watchQueryOptions.ts
+++ b/src/core/watchQueryOptions.ts
@@ -266,8 +266,8 @@ export interface MutationBaseOptions<
 
 export interface MutationOptions<
   T,
-  TVariables extends OperationVariables,
-  TContext extends Context,
+  TVariables extends OperationVariables = OperationVariables,
+  TContext extends Context = Context,
 > extends MutationBaseOptions<T, TVariables, TContext> {
   /**
    * A GraphQL document, often created with `gql` from the `graphql-tag`