Index: libcfa/prelude/Makefile.am
===================================================================
--- libcfa/prelude/Makefile.am	(revision c9603315ea21ea420cca7496661da95111be0209)
+++ 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}}