diff --git a/index.js b/index.js
index 95711c7d..6b9c72c7 100644
--- a/index.js
+++ b/index.js
@@ -3,4 +3,5 @@ export { default as from } from './src/literal';
 export { map, filter, reduce, find } from './src/query';
 export { default as Store } from './src/identity';
 export { metaOf, valueOf } from './src/meta';
+export { relationship } from './src/relationship.js';
 export * from './src/types';
diff --git a/tests/index.test.js b/tests/index.test.js
index 27237bc2..64203e3d 100644
--- a/tests/index.test.js
+++ b/tests/index.test.js
@@ -23,4 +23,7 @@ describe('index of module exports', () => {
     expect(index.metaOf).toBeInstanceOf(Function);
     expect(index.valueOf).toBeInstanceOf(Function);
   });
+  it('has the relationship function', () => {
+    expect(index.relationship).toBeInstanceOf(Function);
+  });
 });