Index: libcfa/prelude/Makefile.am
===================================================================
--- libcfa/prelude/Makefile.am	(revision d7a10aff63ea1cd1a6c0d13bc06ac341ed3ef568)
+++ libcfa/prelude/Makefile.am	(revision 2a59655a1dd1d977b68a881bb4951a8e017eeb1d)
@@ -70,4 +70,5 @@
 
 MOSTLYCLEANFILES = bootloader.c builtins.cf extras.cf gcc-builtins.c gcc-builtins.cf prelude.cfa
+DISTCLEANFILES = $(DEPDIR)/builtins.Po
 MAINTAINERCLEANFILES = ${addprefix ${libdir}/,${cfalib_DATA}} ${addprefix ${libdir}/,${lib_LIBRARIES}}
 
Index: libcfa/src/Makefile.am
===================================================================
--- libcfa/src/Makefile.am	(revision d7a10aff63ea1cd1a6c0d13bc06ac341ed3ef568)
+++ libcfa/src/Makefile.am	(revision 2a59655a1dd1d977b68a881bb4951a8e017eeb1d)
@@ -197,4 +197,7 @@
 	-rm -rf ${CFA_INCDIR} ${CFA_LIBDIR}
 
+distclean-local:
+	find ${builddir} -path '*.Plo' -delete
+
 
 # $(AM_V_CFA)depbase=`echo $@ | sed 's|[^/]*$$|$(DEPDIR)/&|;s|\.o$$||'`;\