diff --git a/doc/doxygen/Makefile b/doc/doxygen/Makefile
index 9dad5f4932..c64e7d411a 100644
--- a/doc/doxygen/Makefile
+++ b/doc/doxygen/Makefile
@@ -2,4 +2,4 @@ doc:
 	doxygen riot.doxyfile
 
 clean:
-	-@rm -rf latex man html
+	-@rm -rf latex man html doxygen_objdb_*.tmp