diff --git a/src/collision/Detector.js b/src/collision/Detector.js
index 041ccbde..f7cb2884 100644
--- a/src/collision/Detector.js
+++ b/src/collision/Detector.js
@@ -31,7 +31,7 @@ var Bounds = require('../geometry/Bounds');
             var bodyA = broadphasePairs[i][0], 
                 bodyB = broadphasePairs[i][1];
 
-            if ((bodyA.isStatic || bodyA.isSleeping) && (bodyB.isStatic || bodyB.isSleeping))
+            if (bodyA.isSleeping && bodyB.isSleeping)
                 continue;
             
             if (!Detector.canCollide(bodyA.collisionFilter, bodyB.collisionFilter))
diff --git a/src/collision/Grid.js b/src/collision/Grid.js
index 55b62efd..ca58a1d5 100644
--- a/src/collision/Grid.js
+++ b/src/collision/Grid.js
@@ -231,7 +231,10 @@ var Common = require('../core/Common');
         for (var i = 0; i < bucket.length; i++) {
             var bodyB = bucket[i];
 
-            if (body.id === bodyB.id || (body.isStatic && bodyB.isStatic))
+            if (body.id === bodyB.id)
+                continue;
+
+            if (body.isStatic && bodyB.isStatic && !(body.isSensor || bodyB.isSensor))
                 continue;
 
             // keep track of the number of buckets the pair exists in