diff --git a/examples/Importers/ImportURDFDemo/URDF2Bullet.cpp b/examples/Importers/ImportURDFDemo/URDF2Bullet.cpp
index 4f2a30b70..a9a90af6f 100644
--- a/examples/Importers/ImportURDFDemo/URDF2Bullet.cpp
+++ b/examples/Importers/ImportURDFDemo/URDF2Bullet.cpp
@@ -677,7 +677,7 @@ btTransform ConvertURDF2BulletInternal(
 						} while (testLinkIndex> 0);
 						if (allJointsFixed)
 						{
-							col->setCollisionFlags(btCollisionObject::CF_STATIC_OBJECT);
+							col->setCollisionFlags(col->getCollisionFlags() | btCollisionObject::CF_STATIC_OBJECT);
 						}
 
 					}
@@ -699,7 +699,7 @@ btTransform ConvertURDF2BulletInternal(
 						//&& cache.m_bulletMultiBody->getNumDofs()==0)
 						{
 							//col->setCollisionFlags(btCollisionObject::CF_KINEMATIC_OBJECT);
-							col->setCollisionFlags(btCollisionObject::CF_STATIC_OBJECT);
+							col->setCollisionFlags(col->getCollisionFlags() | btCollisionObject::CF_STATIC_OBJECT);
 						}
 					}