diff --git a/crypto/des/des.org b/crypto/des/des.org
index 295fb75ad..0e84c6eaa 100644
--- a/crypto/des/des.org
+++ b/crypto/des/des.org
@@ -153,7 +153,7 @@ extern int des_set_weak_key_flag; /* set the weak key flag */
 #endif
 #ifndef NOPROTO
 const char *des_options(void);
-void des_ecb3_encrypt(const unsigned char *input,unsigned char *output,
+void des_ecb3_encrypt(const des_cblock input, des_cblock output,
 		      des_key_schedule ks1,des_key_schedule ks2,
 		      des_key_schedule ks3, int enc);
 DES_LONG des_cbc_cksum(const unsigned char *input,des_cblock output,
diff --git a/crypto/des/ecb3_enc.c b/crypto/des/ecb3_enc.c
index 16e784fe8..5ffcdd7fd 100644
--- a/crypto/des/ecb3_enc.c
+++ b/crypto/des/ecb3_enc.c
@@ -58,7 +58,7 @@
 
 #include "des_locl.h"
 
-void des_ecb3_encrypt(const unsigned char *in, unsigned char *out,
+void des_ecb3_encrypt(const des_cblock in, des_cblock out,
 	     des_key_schedule ks1, des_key_schedule ks2, des_key_schedule ks3,
 	     int enc)
 	{