diff --git a/doc/Makefile b/doc/Makefile
index 5b9ab69cf2b..5bb9ef9bd5d 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -61,6 +61,7 @@ clean:
 	@rm -rf $(BUILDDIR)/*
 	@rm -rf html
 	@rm -rf xml
+	@rm -rf doxygen
 	@rm -rf latex
 	@rm -rf reference/kconfig/*.rst
 	@rm -rf samples