1 files changed, 2 insertions, 2 deletions

diff --git a/src/lib/libcrypto/rc4/rc4.h b/src/lib/libcrypto/rc4/rc4.h
index 7418c2a9a2..8556dddab0 100644
--- a/src/lib/libcrypto/rc4/rc4.h
+++ b/src/lib/libcrypto/rc4/rc4.h
@@ -77,8 +77,8 @@ typedef struct rc4_key_st
 
  
 const char *RC4_options(void);
-void RC4_set_key(RC4_KEY *key, int len, unsigned char *data);
-void RC4(RC4_KEY *key, unsigned long len, unsigned char *indata,
+void RC4_set_key(RC4_KEY *key, int len, const unsigned char *data);
+void RC4(RC4_KEY *key, unsigned long len, const unsigned char *indata,
                 unsigned char *outdata);
 
 #ifdef  __cplusplus