diff --git a/src/BulletSoftBody/btSoftMultiBodyDynamicsWorld.cpp b/src/BulletSoftBody/btSoftMultiBodyDynamicsWorld.cpp
index dcdd932028..b38fce4724 100644
--- a/src/BulletSoftBody/btSoftMultiBodyDynamicsWorld.cpp
+++ b/src/BulletSoftBody/btSoftMultiBodyDynamicsWorld.cpp
@@ -177,6 +177,7 @@ void btSoftMultiBodyDynamicsWorld::debugDrawWorld()
 	}
 }
 
+namespace {
 struct btSoftSingleRayCallback : public btBroadphaseRayCallback
 {
 	btVector3 m_rayFromWorld;
@@ -250,6 +251,7 @@ struct btSoftSingleRayCallback : public btBroadphaseRayCallback
 		return true;
 	}
 };
+}
 
 void btSoftMultiBodyDynamicsWorld::rayTest(const btVector3& rayFromWorld, const btVector3& rayToWorld, RayResultCallback& resultCallback) const
 {
diff --git a/src/BulletSoftBody/btSoftRigidDynamicsWorld.cpp b/src/BulletSoftBody/btSoftRigidDynamicsWorld.cpp
index dc9b004a37..b3d8486c78 100644
--- a/src/BulletSoftBody/btSoftRigidDynamicsWorld.cpp
+++ b/src/BulletSoftBody/btSoftRigidDynamicsWorld.cpp
@@ -172,6 +172,7 @@ void btSoftRigidDynamicsWorld::debugDrawWorld()
 	}
 }
 
+namespace {
 struct btSoftSingleRayCallback : public btBroadphaseRayCallback
 {
 	btVector3 m_rayFromWorld;
@@ -245,6 +246,7 @@ struct btSoftSingleRayCallback : public btBroadphaseRayCallback
 		return true;
 	}
 };
+}
 
 void btSoftRigidDynamicsWorld::rayTest(const btVector3& rayFromWorld, const btVector3& rayToWorld, RayResultCallback& resultCallback) const
 {