diff --git a/README.md b/README.md
index dc5eaa4c3..386191e15 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,8 @@ Version 2.2.2 - "Alkindar" - in development
 ### Updates
 
 * TypeScript definitions fixes and updates (thanks @clark-stevenson)
+* DOM.visualBounds now includes scroll bars (#1429)
+* The new fixed time-step code has been more carefully linked to Pixi transform updates. This should finally put a stop to the tunneling issues that were being reported.
 
 ### Bug Fixes
 
@@ -94,6 +96,7 @@ Android browser does not support Full Screen.
 * TilemapParser now checks for image collections, avoiding crashes. These would arise with maps exported from the new release of Tiled (thanks @paul-reilly #1440)
 * Group.replace could still access `newChild.parent` after it was set to `undefined`. This unifies the approach (thanks @pnstickney #1410 #1417)
 * P2.postBroadphaserHandler updated to avoid skipping final 2 pairs.
+* The P2 World constructor wouldn't let you use your own config unless you specified both the gravity *and* broadphase. Now allows one or both (thanks @englercj #1412)
 
 For details about changes made in previous versions of Phaser see the full Change Log at https://github.com/photonstorm/phaser/blob/master/CHANGELOG.md
 
diff --git a/src/physics/p2/World.js b/src/physics/p2/World.js
index 05dd176bf..f4d415707 100644
--- a/src/physics/p2/World.js
+++ b/src/physics/p2/World.js
@@ -24,10 +24,22 @@ Phaser.Physics.P2 = function (game, config) {
     */
     this.game = game;
 
-    if (typeof config === 'undefined' || !config.hasOwnProperty('gravity') || !config.hasOwnProperty('broadphase'))
+    if (typeof config === 'undefined')
     {
         config = { gravity: [0, 0], broadphase: new p2.SAPBroadphase() };
     }
+    else
+    {
+        if (!config.hasOwnProperty('gravity')
+        {
+            config.gravity: [0, 0];
+        }
+
+        if (!config.hasOwnProperty('broadphase')
+        {
+            config.broadphase: new p2.SAPBroadphase();
+        }
+    }
 
     /**
     * @property {object} config - The p2 World configuration object.