diff --git a/modules/router-store/spec/serializer.spec.ts b/modules/router-store/spec/serializer.spec.ts
new file mode 100644
index 0000000000..cda454ad13
--- /dev/null
+++ b/modules/router-store/spec/serializer.spec.ts
@@ -0,0 +1,101 @@
+import { RouterStateSnapshot } from '@angular/router';
+import { DefaultRouterStateSerializer } from '../src';
+
+describe('serializer', () => {
+  it('should serialize all properties', () => {
+    const serializer = new DefaultRouterStateSerializer();
+    const snapshot = createSnapshot();
+    const routerState = {
+      url: 'url',
+      root: snapshot,
+    } as RouterStateSnapshot;
+
+    const actual = serializer.serialize(routerState);
+    const expected = {
+      url: 'url',
+      root: createExpectedSnapshot(),
+    };
+    expect(actual).toEqual(expected);
+  });
+
+  it('should serialize with an empty routeConfig', () => {
+    const serializer = new DefaultRouterStateSerializer();
+    const snapshot = { ...createSnapshot(), routeConfig: null };
+    const routerState = {
+      url: 'url',
+      root: snapshot,
+    } as RouterStateSnapshot;
+
+    const actual = serializer.serialize(routerState);
+    const expected = {
+      url: 'url',
+      root: {
+        ...createExpectedSnapshot(),
+        routeConfig: null,
+        component: undefined,
+      },
+    };
+    expect(actual).toEqual(expected);
+  });
+
+  it('should serialize children', () => {
+    const serializer = new DefaultRouterStateSerializer();
+    const snapshot = {
+      ...createSnapshot(),
+      children: [createSnapshot('child')],
+    };
+    const routerState = {
+      url: 'url',
+      root: snapshot,
+    } as RouterStateSnapshot;
+
+    const actual = serializer.serialize(routerState);
+
+    const expected = {
+      url: 'url',
+      root: {
+        ...createExpectedSnapshot(),
+        firstChild: createExpectedSnapshot('child'),
+        children: [createExpectedSnapshot('child')],
+      },
+    };
+
+    expect(actual).toEqual(expected);
+  });
+
+  function createSnapshot(prefix = 'root'): any {
+    return {
+      params: `${prefix}-route.params`,
+      paramMap: `${prefix}-route.paramMap`,
+      data: `${prefix}-route.data`,
+      url: `${prefix}-route.url`,
+      outlet: `${prefix}-route.outlet`,
+      routeConfig: {
+        component: `${prefix}-route.routeConfig.component`,
+        path: `${prefix}-route.routeConfig.path`,
+        pathMatch: `${prefix}-route.routeConfig.pathMatch`,
+        redirectTo: `${prefix}-route.routeConfig.redirectTo`,
+        outlet: `${prefix}-route.routeConfig.outlet`,
+      },
+      queryParams: `${prefix}-route.queryParams`,
+      queryParamMap: `${prefix}-route.queryParamMap`,
+      fragment: `${prefix}-route.fragment`,
+      root: `${prefix}-route.root`,
+      parent: `${prefix}-route.parent`,
+      pathFromRoot: `${prefix}-route.params`,
+      firstChild: null,
+      children: [],
+    };
+  }
+
+  function createExpectedSnapshot(prefix = 'root') {
+    return {
+      ...createSnapshot(prefix),
+      component: `${prefix}-route.routeConfig.component`,
+      root: undefined,
+      parent: undefined,
+      firstChild: undefined,
+      pathFromRoot: undefined,
+    };
+  }
+});
diff --git a/modules/router-store/src/serializer.ts b/modules/router-store/src/serializer.ts
index 74b91c1666..23596ef3c5 100644
--- a/modules/router-store/src/serializer.ts
+++ b/modules/router-store/src/serializer.ts
@@ -39,9 +39,15 @@ export class DefaultRouterStateSerializer
       data: route.data,
       url: route.url,
       outlet: route.outlet,
-      routeConfig: {
-        component: route.routeConfig ? route.routeConfig.component : undefined,
-      },
+      routeConfig: route.routeConfig
+        ? {
+            component: route.routeConfig.component,
+            path: route.routeConfig.path,
+            pathMatch: route.routeConfig.pathMatch,
+            redirectTo: route.routeConfig.redirectTo,
+            outlet: route.routeConfig.outlet,
+          }
+        : null,
       queryParams: route.queryParams,
       queryParamMap: route.queryParamMap,
       fragment: route.fragment,
diff --git a/projects/ngrx.io/content/guide/migration/v7.md b/projects/ngrx.io/content/guide/migration/v7.md
index cf5b61af8d..2f831f3939 100644
--- a/projects/ngrx.io/content/guide/migration/v7.md
+++ b/projects/ngrx.io/content/guide/migration/v7.md
@@ -94,6 +94,26 @@ AFTER:
 StoreRouterConnectingModule.forRoot(),
 ```
 
+### ActivatedRouteSnapshot.RouteConfig
+
+The default router serializer now returns a `null` value for `routeConfig` when `routeConfig` doesn't exist on the `ActivatedRouteSnapshot` instead of an empty object.
+
+BEFORE:
+
+```json
+{
+  "routeConfig": {}
+}
+```
+
+AFTER:
+
+```json
+{
+  "routeConfig": null
+}
+```
+
 ## @ngrx/store-devtools
 
 The devtools is using the new `@ngrx/store-devtools/recompute` action to recompute its state instead of the `@ngrx/store/update-reducers` action.