diff --git a/include/Makefile.am b/include/Makefile.am
index 2c2c8adfe..f4d350c93 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -39,6 +39,7 @@ CLEANFILES =		\
 	krb5_err.h	\
 	md4.h		\
 	md5.h		\
+	rc4.h		\
 	otp.h		\
 	parse_time.h	\
 	parse_units.h	\