diff --git a/crypto/des/des.h b/crypto/des/des.h
index 3cbc2b568e..92b6663599 100644
--- a/crypto/des/des.h
+++ b/crypto/des/des.h
@@ -195,9 +195,10 @@ void DES_ede3_ofb64_encrypt(const unsigned char *in,unsigned char *out,
 			    long length,DES_key_schedule *ks1,
 			    DES_key_schedule *ks2,DES_key_schedule *ks3,
 			    DES_cblock *ivec,int *num);
-
+#if 0
 void DES_xwhite_in2out(const_DES_cblock *DES_key,const_DES_cblock *in_white,
 		       DES_cblock *out_white);
+#endif
 
 int DES_enc_read(int fd,void *buf,int len,DES_key_schedule *sched,
 		 DES_cblock *iv);
diff --git a/crypto/des/des_old.h b/crypto/des/des_old.h
index 1b0620c3a2..2b2c372354 100644
--- a/crypto/des/des_old.h
+++ b/crypto/des/des_old.h
@@ -364,9 +364,10 @@ void _ossl_old_des_ede3_cfb64_encrypt(unsigned char *in, unsigned char *out,
 void _ossl_old_des_ede3_ofb64_encrypt(unsigned char *in, unsigned char *out,
 	long length, _ossl_old_des_key_schedule ks1, _ossl_old_des_key_schedule ks2,
 	_ossl_old_des_key_schedule ks3, _ossl_old_des_cblock *ivec, int *num);
-
+#if 0
 void _ossl_old_des_xwhite_in2out(_ossl_old_des_cblock (*des_key), _ossl_old_des_cblock (*in_white),
 	_ossl_old_des_cblock (*out_white));
+#endif
 
 int _ossl_old_des_enc_read(int fd,char *buf,int len,_ossl_old_des_key_schedule sched,
 	_ossl_old_des_cblock *iv);
diff --git a/util/mk1mf.pl b/util/mk1mf.pl
index 77af8a7e57..1ac5fd3a50 100755
--- a/util/mk1mf.pl
+++ b/util/mk1mf.pl
@@ -1039,6 +1039,7 @@ sub read_options
 		"shared" => 0,
 		"no-gmp" => 0,
 		"no-rfc3779" => 0,
+		"no-montasm" => 0,
 		"no-shared" => 0,
 		"no-zlib" => 0,
 		"no-zlib-dynamic" => 0,