EVP constification.
diff --git a/crypto/rc2/rc2_ecb.c b/crypto/rc2/rc2_ecb.c
index 7d77b91..d3e8c27 100644
--- a/crypto/rc2/rc2_ecb.c
+++ b/crypto/rc2/rc2_ecb.c
@@ -70,8 +70,8 @@
  * Date: 11 Feb 1996 06:45:03 GMT
  */
 
-void RC2_ecb_encrypt(unsigned char *in, unsigned char *out, RC2_KEY *ks,
-	     int encrypt)
+void RC2_ecb_encrypt(const unsigned char *in, unsigned char *out, RC2_KEY *ks,
+		     int encrypt)
 	{
 	unsigned long l,d[2];