diff --git a/doc/Makefile.am b/doc/Makefile.am
index 56fd1feaa2..80241d2b5e 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -108,7 +108,7 @@ all-local: Doxyfile.stamp
 
 clean-local: clean-api-docs-local
 clean-api-docs-local:
-	-rm -rf reference/ Doxyfile.stamp
+	-rm -rf reference/ Doxyfile.stamp doxygen_*
 
 endif