diff --git a/pppd/Makefile.linux b/pppd/Makefile.linux
index 534ccc2..cf11b74 100644
--- a/pppd/Makefile.linux
+++ b/pppd/Makefile.linux
@@ -41,7 +41,7 @@ COPTS = -Wall $(RPM_OPT_FLAGS) -DLIBDIR=\""$(LIBDIR)"\"
 # Uncomment the next 2 lines to include support for Microsoft's
 # MS-CHAP authentication protocol.  Also, edit plugins/radius/Makefile.linux.
 CHAPMS=y
-USE_CRYPT=y
+#USE_CRYPT=y
 # Don't use MSLANMAN unless you really know what you're doing.
 #MSLANMAN=y
 # Uncomment the next line to include support for MPPE.  CHAPMS (above) must
@@ -147,7 +147,8 @@ endif
 
 ifdef NEEDDES
 ifndef USE_CRYPT
-LIBS     += -ldes $(LIBS)
+CFLAGS   += -I/usr/include/openssl
+LIBS     += -lcrypto
 else
 CFLAGS   += -DUSE_CRYPT=1
 endif
diff --git a/pppd/pppcrypt.c b/pppd/pppcrypt.c
index 8b85b13..6b35375 100644
--- a/pppd/pppcrypt.c
+++ b/pppd/pppcrypt.c
@@ -64,7 +64,7 @@ u_char *des_key;	/* OUT 64 bit DES key with parity bits added */
 	des_key[7] = Get7Bits(key, 49);
 
 #ifndef USE_CRYPT
-	des_set_odd_parity((des_cblock *)des_key);
+	DES_set_odd_parity((DES_cblock *)des_key);
 #endif
 }
 
@@ -158,25 +158,25 @@ u_char *clear;	/* OUT 8 octets */
 }
 
 #else /* USE_CRYPT */
-static des_key_schedule	key_schedule;
+static DES_key_schedule	key_schedule;
 
 bool
 DesSetkey(key)
 u_char *key;
 {
-	des_cblock des_key;
+	DES_cblock des_key;
 	MakeKey(key, des_key);
-	des_set_key(&des_key, key_schedule);
+	DES_set_key(&des_key, &key_schedule);
 	return (1);
 }
 
 bool
-DesEncrypt(clear, key, cipher)
+DesEncrypt(clear, cipher)
 u_char *clear;	/* IN  8 octets */
 u_char *cipher;	/* OUT 8 octets */
 {
-	des_ecb_encrypt((des_cblock *)clear, (des_cblock *)cipher,
-	    key_schedule, 1);
+	DES_ecb_encrypt((DES_cblock *)clear, (DES_cblock *)cipher,
+	    &key_schedule, 1);
 	return (1);
 }
 
@@ -185,8 +185,8 @@ DesDecrypt(cipher, clear)
 u_char *cipher;	/* IN  8 octets */
 u_char *clear;	/* OUT 8 octets */
 {
-	des_ecb_encrypt((des_cblock *)cipher, (des_cblock *)clear,
-	    key_schedule, 0);
+	DES_ecb_encrypt((DES_cblock *)cipher, (DES_cblock *)clear,
+	    &key_schedule, 0);
 	return (1);
 }