diff --git a/crypto/evp/evp.h b/crypto/evp/evp.h
index cdf5f3cf89..0d71c548a5 100644
--- a/crypto/evp/evp.h
+++ b/crypto/evp/evp.h
@@ -554,9 +554,9 @@ int	EVP_read_pw_string(char *buf,int length,const char *prompt,int verify);
 void	EVP_set_pw_prompt(char *prompt);
 char *	EVP_get_pw_prompt(void);
 
-int	EVP_BytesToKey(const EVP_CIPHER *type,EVP_MD *md,unsigned char *salt,
-		unsigned char *data, int datal, int count,
-		unsigned char *key,unsigned char *iv);
+int     EVP_BytesToKey(const EVP_CIPHER *type, EVP_MD *md,
+		const unsigned char *salt, unsigned char *data, int datal,
+       		int count, unsigned char *key, unsigned char *iv);
 
 int	EVP_EncryptInit(EVP_CIPHER_CTX *ctx,const EVP_CIPHER *type,
 		unsigned char *key, unsigned char *iv);
diff --git a/crypto/evp/evp_key.c b/crypto/evp/evp_key.c
index 09b72bf4bd..f8710bf329 100644
--- a/crypto/evp/evp_key.c
+++ b/crypto/evp/evp_key.c
@@ -95,9 +95,9 @@ int EVP_read_pw_string(char *buf, int len, const char *prompt, int verify)
 #endif
 	}
 
-int EVP_BytesToKey(const EVP_CIPHER *type, EVP_MD *md, unsigned char *salt,
-	     unsigned char *data, int datal, int count, unsigned char *key,
-	     unsigned char *iv)
+int EVP_BytesToKey(const EVP_CIPHER *type, EVP_MD *md, 
+             const unsigned char *salt, unsigned char *data, int datal, 
+             int count, unsigned char *key, unsigned char *iv)
 	{
 	EVP_MD_CTX c;
 	unsigned char md_buf[EVP_MAX_MD_SIZE];