size_t-fy AES, Camellia and RC4.
diff --git a/crypto/rc4/rc4.h b/crypto/rc4/rc4.h
index 7aec04f..29d1acc 100644
--- a/crypto/rc4/rc4.h
+++ b/crypto/rc4/rc4.h
@@ -64,6 +64,8 @@
#error RC4 is disabled.
#endif
+#include <stddef.h>
+
#ifdef __cplusplus
extern "C" {
#endif
@@ -77,7 +79,7 @@
const char *RC4_options(void);
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,
+void RC4(RC4_KEY *key, size_t len, const unsigned char *indata,
unsigned char *outdata);
#ifdef __cplusplus
