diff --git a/src/libGLESv2/renderer/Renderer11.cpp b/src/libGLESv2/renderer/Renderer11.cpp
index 884adda..4604a15 100644
--- a/src/libGLESv2/renderer/Renderer11.cpp
+++ b/src/libGLESv2/renderer/Renderer11.cpp
@@ -1257,4 +1257,11 @@
     return NULL;
 }
 
+void Renderer11::generateMipmap(Image *dest, Image *src)
+{
+    // TODO
+    UNIMPLEMENTED();
+    return;
+}
+
 }
\ No newline at end of file