diff --git a/examples/Importers/ImportURDFDemo/BulletUrdfImporter.h b/examples/Importers/ImportURDFDemo/BulletUrdfImporter.h
index 34a28f15d..8acf2cefd 100644
--- a/examples/Importers/ImportURDFDemo/BulletUrdfImporter.h
+++ b/examples/Importers/ImportURDFDemo/BulletUrdfImporter.h
@@ -19,7 +19,7 @@ class BulletURDFImporter : public URDFImporterInterface
 	struct BulletURDFInternalData* m_data;
 
 public:
-	BulletURDFImporter(struct GUIHelperInterface* helper, UrdfRenderingInterface* customConverter, struct CommonFileIOInterface* fileIO,double globalScaling, int flags);
+	BulletURDFImporter(struct GUIHelperInterface* helper, UrdfRenderingInterface* customConverter, struct CommonFileIOInterface* fileIO=0,double globalScaling=1, int flags=0);
 
 	virtual ~BulletURDFImporter();
 
diff --git a/examples/TinyRenderer/TinyRenderer.cpp b/examples/TinyRenderer/TinyRenderer.cpp
index 0e3a5f4e6..06984b6e8 100644
--- a/examples/TinyRenderer/TinyRenderer.cpp
+++ b/examples/TinyRenderer/TinyRenderer.cpp
@@ -14,6 +14,8 @@
 #include "LinearMath/btVector3.h"
 #include "Bullet3Common/b3Logging.h"
 #include "../CommonInterfaces/CommonFileIOInterface.h"
+#include "../Utils/b3BulletDefaultFileIO.h"
+
 struct DepthShader : public IShader
 {
 	Model* m_model;
@@ -370,6 +372,12 @@ void TinyRenderObjectData::registerMesh2(btAlignedObjectArray<btVector3>& vertic
 
 void TinyRenderObjectData::createCube(float halfExtentsX, float halfExtentsY, float halfExtentsZ, CommonFileIOInterface* fileIO)
 {
+	b3BulletDefaultFileIO defaultFileIO;
+
+	if (fileIO==0)
+	{
+		fileIO = &defaultFileIO;
+	}
 	m_model = new Model();
 
 	char relativeFileName[1024];
diff --git a/examples/TinyRenderer/TinyRenderer.h b/examples/TinyRenderer/TinyRenderer.h
index 414a7814d..e5b7ae289 100644
--- a/examples/TinyRenderer/TinyRenderer.h
+++ b/examples/TinyRenderer/TinyRenderer.h
@@ -42,7 +42,7 @@ struct TinyRenderObjectData
 	virtual ~TinyRenderObjectData();
 
 	void loadModel(const char* fileName, struct CommonFileIOInterface* fileIO);
-	void createCube(float HalfExtentsX, float HalfExtentsY, float HalfExtentsZ, struct CommonFileIOInterface* fileIO);
+	void createCube(float HalfExtentsX, float HalfExtentsY, float HalfExtentsZ, struct CommonFileIOInterface* fileIO=0);
 	void registerMeshShape(const float* vertices, int numVertices, const int* indices, int numIndices, const float rgbaColor[4],
 						   unsigned char* textureImage = 0, int textureWidth = 0, int textureHeight = 0);