diff --git a/README.md b/README.md
index 5b5d4a9..6825bfa 100644
--- a/README.md
+++ b/README.md
@@ -103,13 +103,13 @@ pass a function to `undoable` like this:
 
 ```js
 undoable(reducer, function filterActions(action, currentState, previousState) {
-  return action.type !== SOME_ACTION; // don't add to history if action isn't SOME_ACTION
+  return action.type === SOME_ACTION; // only add to history if action is SOME_ACTION
 })
 
 // or you could do...
 
 undoable(reducer, function filterState(action, currentState, previousState) {
-  return currentState === previousState; // don't add to history if state stayed the same
+  return currentState !== previousState; // only add to history if state changed
 })
 ```
 
diff --git a/package.json b/package.json
index aed4b8b..c28f4be 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "redux-undo",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "description": "simple undo/redo functionality for redux state containers",
   "main": "lib/index.js",
   "scripts": {
diff --git a/src/index.js b/src/index.js
index d7a3724..349d226 100644
--- a/src/index.js
+++ b/src/index.js
@@ -187,7 +187,7 @@ export function parseActions(rawActions = []) {
 
 // distinctState helper
 export function distinctState() {
-  return (action, currentState, previousState) => currentState === previousState;
+  return (action, currentState, previousState) => currentState !== previousState;
 }
 // /distinctState