diff --git a/poky/documentation/Makefile b/poky/documentation/Makefile
index bec5339..33bbca0 100644
--- a/poky/documentation/Makefile
+++ b/poky/documentation/Makefile
@@ -44,7 +44,7 @@
 	$(SVG2PNG) --export-filename=$@ $<
 
 clean:
-	@rm -rf $(BUILDDIR) $(PNGs) $(PDFs)
+	@rm -rf $(BUILDDIR) $(PNGs) $(PDFs) poky.yaml sphinx-static/switchers.js
 
 epub: $(PNGs)
 	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)