diff --git a/main.go b/main.go
index c607895..3a261b1 100755
--- a/main.go
+++ b/main.go
@@ -36,7 +36,7 @@ func main() {
 
 	sd := pgo.NewSceneDesc(ts)
 	sd.SetGravity(pgo.NewVec3(0, -9.8, 0))
-	sd.SetCpuDispatcher(pgo.DefaultCpuDispatcherCreate(2, 0).ToCpuDispatcher())
+	sd.SetCpuDispatcher(pgo.DefaultCpuDispatcherCreate(2, nil).ToCpuDispatcher())
 	sd.SetOnContactCallback(contactHandler)
 
 	scene := p.CreateScene(sd)
diff --git a/pgo/libs/libphysx-c.a b/pgo/libs/libphysx-c.a
index 15a092a..257a945 100755
Binary files a/pgo/libs/libphysx-c.a and b/pgo/libs/libphysx-c.a differ
diff --git a/pgo/pgo.go b/pgo/pgo.go
index 53a4f94..0d01896 100755
--- a/pgo/pgo.go
+++ b/pgo/pgo.go
@@ -362,9 +362,24 @@ func (d *DefaultCpuDispatcher) ToCpuDispatcher() *CpuDispatcher {
 	return &CpuDispatcher{cCpuDisp: (*C.struct_CPxCpuDispatcher)(d.cDefCpuDisp)}
 }
 
-func DefaultCpuDispatcherCreate(numThreads, affinityMasks uint32) *DefaultCpuDispatcher {
+// DefaultCpuDispatcherCreate sets the number of threads used by physX.
+// If affinityMasksPerThread is nil/zero then default masks are used, otherwise the size of the array
+// must match the number of threads
+func DefaultCpuDispatcherCreate(numThreads uint32, affinityMasksPerThread []uint32) *DefaultCpuDispatcher {
+
+	if len(affinityMasksPerThread) == 0 {
+		return &DefaultCpuDispatcher{
+			cDefCpuDisp: C.CPxDefaultCpuDispatcherCreate(C.uint(numThreads), nil),
+		}
+	}
+
+	arr := make([]C.uint, len(affinityMasksPerThread))
+	for i := 0; i < len(arr); i++ {
+		arr[i] = C.uint(affinityMasksPerThread[i])
+	}
+
 	return &DefaultCpuDispatcher{
-		cDefCpuDisp: C.CPxDefaultCpuDispatcherCreate(C.uint(numThreads), C.uint(affinityMasks)),
+		cDefCpuDisp: C.CPxDefaultCpuDispatcherCreate(C.uint(numThreads), &arr[0]),
 	}
 }
 
diff --git a/pgo/physx-c/CPxDefaultCpuDispatcher.h b/pgo/physx-c/CPxDefaultCpuDispatcher.h
index 4a161e1..be7f913 100755
--- a/pgo/physx-c/CPxDefaultCpuDispatcher.h
+++ b/pgo/physx-c/CPxDefaultCpuDispatcher.h
@@ -11,7 +11,7 @@ extern "C" {
 		void* obj;
 	};
 
-	CPxAPI CSTRUCT CPxDefaultCpuDispatcher* CPxDefaultCpuDispatcherCreate(CPxU32 numThreads, CPxU32 affinityMasks);
+	CPxAPI CSTRUCT CPxDefaultCpuDispatcher* CPxDefaultCpuDispatcherCreate(CPxU32 numThreads, CPxU32* affinityMasks);
 	CPxAPI CSTRUCT CPxCpuDispatcher* CPxDefaultCpuDispatcher_toCPxCpuDispatcher(CSTRUCT CPxDefaultCpuDispatcher* cdcd);
 	CPxAPI void CPxDefaultCpuDispatcher_release(CSTRUCT CPxDefaultCpuDispatcher* cdcd);