diff --git a/libraries/gpu-gl-common/src/gpu/gl/GLBuffer.h b/libraries/gpu-gl-common/src/gpu/gl/GLBuffer.h
index b9fe125c8d..6b7d3405f0 100644
--- a/libraries/gpu-gl-common/src/gpu/gl/GLBuffer.h
+++ b/libraries/gpu-gl-common/src/gpu/gl/GLBuffer.h
@@ -65,7 +65,7 @@ public:
 
     ~GLBuffer();
 
-    virtual void transfer() {};
+    virtual void transfer() = 0;
 
 protected:
     GLBuffer(const std::weak_ptr<GLBackend>& backend, const Buffer& buffer, GLuint id);