diff --git a/src/libGLESv2/renderer/Renderer11.cpp b/src/libGLESv2/renderer/Renderer11.cpp
index 8c3e679..bbdb731 100644
--- a/src/libGLESv2/renderer/Renderer11.cpp
+++ b/src/libGLESv2/renderer/Renderer11.cpp
@@ -374,6 +374,15 @@
     mForceSetScissor = false;
 }
 
+bool Renderer11::setViewport(const gl::Rectangle& viewport, float zNear, float zFar,
+                             unsigned int renderTargetWidth, unsigned int renderTargetHeight,
+                             gl::ProgramBinary *currentProgram, bool forceSetUniforms)
+{
+    // TODO
+    UNIMPLEMENTED();
+    return true;
+}
+
 void Renderer11::applyRenderTarget(gl::Framebuffer *frameBuffer)
 {
     // TODO