diff --git a/src/libGLESv2/renderer/Renderer11.cpp b/src/libGLESv2/renderer/Renderer11.cpp
index b0ff71a..41318b1 100644
--- a/src/libGLESv2/renderer/Renderer11.cpp
+++ b/src/libGLESv2/renderer/Renderer11.cpp
@@ -436,4 +436,18 @@
     return 1;
 }
 
+bool Renderer11::copyToRenderTarget(gl::TextureStorage2D *dest, gl::TextureStorage2D *source)
+{
+    // TODO
+    UNIMPLEMENTED();
+    return false;
+}
+
+bool Renderer11::copyToRenderTarget(gl::TextureStorageCubeMap *dest, gl::TextureStorageCubeMap *source)
+{
+    // TODO
+    UNIMPLEMENTED();
+    return false;
+}
+
 }
\ No newline at end of file