diff --git a/src/BulletCollision/CollisionDispatch/btCollisionObject.h b/src/BulletCollision/CollisionDispatch/btCollisionObject.h
index e085c4089..dbe82fd61 100644
--- a/src/BulletCollision/CollisionDispatch/btCollisionObject.h
+++ b/src/BulletCollision/CollisionDispatch/btCollisionObject.h
@@ -24,6 +24,7 @@ subject to the following restrictions:
 #define WANTS_DEACTIVATION 3
 #define DISABLE_DEACTIVATION 4
 #define DISABLE_SIMULATION 5
+#define FIXED_BASE_MULTI_BODY 6
 
 struct btBroadphaseProxy;
 class btCollisionShape;
@@ -304,7 +305,7 @@ public:
 
 	SIMD_FORCE_INLINE bool isActive() const
 	{
-		return ((getActivationState() != ISLAND_SLEEPING) && (getActivationState() != DISABLE_SIMULATION));
+		return ((getActivationState() != FIXED_BASE_MULTI_BODY) && (getActivationState() != ISLAND_SLEEPING) && (getActivationState() != DISABLE_SIMULATION));
 	}
 
 	void setRestitution(btScalar rest)
diff --git a/src/BulletDynamics/Featherstone/btMultiBody.h b/src/BulletDynamics/Featherstone/btMultiBody.h
index b48b3d1a0..345970d26 100644
--- a/src/BulletDynamics/Featherstone/btMultiBody.h
+++ b/src/BulletDynamics/Featherstone/btMultiBody.h
@@ -545,7 +545,10 @@ public:
 	{
 		m_canWakeup = canWakeup;
 	}
-	bool isAwake() const { return m_awake; }
+	bool isAwake() const 
+	{ 
+		return m_awake; 
+	}
 	void wakeUp();
 	void goToSleep();
 	void checkMotionAndSleepIfRequired(btScalar timestep);
diff --git a/src/BulletDynamics/Featherstone/btMultiBodyDynamicsWorld.cpp b/src/BulletDynamics/Featherstone/btMultiBodyDynamicsWorld.cpp
index 9f304929c..e7af332eb 100644
--- a/src/BulletDynamics/Featherstone/btMultiBodyDynamicsWorld.cpp
+++ b/src/BulletDynamics/Featherstone/btMultiBodyDynamicsWorld.cpp
@@ -139,7 +139,7 @@ void btMultiBodyDynamicsWorld::updateActivationState(btScalar timeStep)
 				{
                     if (body->hasFixedBase())
 					{
-                        col->setActivationState(ISLAND_SLEEPING);
+                        col->setActivationState(FIXED_BASE_MULTI_BODY);
                     } else
 					{
                         col->setActivationState(WANTS_DEACTIVATION);