diff --git a/Makefile.am b/Makefile.am
index 87ce0faf..35a9c20e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -49,6 +49,8 @@ pkgconfig_DATA = libmicrohttpd.pc
 
 EXTRA_DIST += pre-dist-hook-dummy
 MOSTLYCLEANFILES = pre-dist-hook-dummy
+# Old branch files
+MOSTLYCLEANFILES += MHD_config.h '$(top_srcdir)\MHD_config.h.in'
 DISTCLEANFILES =
 MAINTAINERCLEANFILES = m4/c_backported.m4