2 files changed, 5 insertions, 3 deletions
diff --git a/packages/gitbook-core/src/createPlugin.js b/packages/gitbook-core/src/createPlugin.js
index c26d745..d00c99d 100644
--- a/packages/gitbook-core/src/createPlugin.js
+++ b/packages/gitbook-core/src/createPlugin.js
@@ -7,6 +7,8 @@
  * @return {Plugin}
  */
 function createPlugin(onInitialState, onReduceState) {
+    onReduceState = onReduceState || ((state, action) => state);
+
     const plugin = {
         onInitialState,
         onReduceState
diff --git a/packages/gitbook-core/src/createStore.js b/packages/gitbook-core/src/createStore.js
index c13f219..4873190 100644
--- a/packages/gitbook-core/src/createStore.js
+++ b/packages/gitbook-core/src/createStore.js
@@ -13,12 +13,12 @@ const reducers = require('./reducers');
  */
 function createStore(plugins, initialState) {
     const pluginReducers = plugins.map(plugin => plugin.onReduceState);
+    console.log(pluginReducers);
     const reducer = Redux.compose(reducers, ...pluginReducers);
-
     const store = Redux.createStore(
-        reducer,
+        reducers,
         initialState,
-        Redux.applyMiddleware(ReduxThunk)
+        Redux.compose(Redux.applyMiddleware(ReduxThunk))
     );
 
     // Initialize the plugins