diff --git a/include/Makefile.am b/include/Makefile.am
index ca2fdcb10..52342e2ea 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -16,7 +16,8 @@ foo_DATA = \
 
 EXTRA_DATA = err.h
 
-CLEANFILES = $(foo_DATA)
+CLEANFILES = $(foo_DATA) asn1.h asn1_err.h hdb_asn1.h hdb_err.h heim_err.h \
+	     krb5_err.h
 
 bits.h: bits
 	./bits bits.h