diff --git a/ChangeLog b/ChangeLog
index d4fc4cf..cb54fa1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,9 +2,14 @@
 Version 1.6.7
 *******************************************************************************
 
+2010-04-25 Marcelo Jimenez <mroberto(at)users.sourceforge.net>
+	Define PROTOTYPES to be one by default in global.h. This affects the
+	RSA MD5 code.
+	
 2010-03-27 Nick Leverton <nick@leverton.org>
 	Subscription auto-renewals copy the renewal time from old subscription.
 
+
 2010-03-27 Marcelo Jimenez <mroberto(at)users.sourceforge.net>
 	Backport of svn revision 527:
 	* Added API to ithread, created the following functions:
diff --git a/upnp/src/inc/global.h b/upnp/src/inc/global.h
index 570700d..7e28174 100644
--- a/upnp/src/inc/global.h
+++ b/upnp/src/inc/global.h
@@ -38,13 +38,13 @@
 /* PROTOTYPES should be set to one if and only if the compiler supports
   function argument prototyping.
 
-  The following makes PROTOTYPES default to 0 if it has not already
+  The following makes PROTOTYPES default to 1 if it has not already
   been defined with C compiler flags.
 */
 
 
 #ifndef PROTOTYPES
-	#define PROTOTYPES 0
+	#define PROTOTYPES 1
 #endif
 
 /* POINTER defines a generic pointer type */
diff --git a/upnp/src/inc/sysdep.h b/upnp/src/inc/sysdep.h
index eb8980a..51d020b 100644
--- a/upnp/src/inc/sysdep.h
+++ b/upnp/src/inc/sysdep.h
@@ -83,7 +83,7 @@ typedef struct {
 
 void get_ieee_node_identifier(uuid_node_t *node);
 void get_system_time(uuid_time_t *uuid_time);
-void get_random_info(char seed[16]);
+void get_random_info(unsigned char seed[16]);
 
 
 #endif /* SYSDEP_H */
diff --git a/upnp/src/uuid/sysdep.c b/upnp/src/uuid/sysdep.c
index c90467b..711c5f0 100644
--- a/upnp/src/uuid/sysdep.c
+++ b/upnp/src/uuid/sysdep.c
@@ -18,14 +18,16 @@
  */
 
 #include "config.h"
-#ifdef WIN32
-	#include <winsock2.h>
-#else /* WIN32 */
-	#include <unistd.h>
-#endif /* WIN32 */
+
+
+#include "sysdep.h"
+
+
+#include "UpnpInet.h"
+
+
 #include <string.h>
 #include <stdio.h>
-#include "sysdep.h"
 
 /*-----------------------------------------------------------------------------*/
 /*
@@ -35,7 +37,7 @@
 void
 get_ieee_node_identifier(uuid_node_t *node)
 {
-    char seed[16];
+    unsigned char seed[16];
     static int inited = 0;
     static uuid_node_t saved_node;
 
@@ -140,7 +142,7 @@ get_system_time(uuid_time_t *uuid_time)
 
 /*-----------------------------------------------------------------------------*/
 void
-get_random_info(char seed[16])
+get_random_info(unsigned char seed[16])
 {
 	MD5_CTX c;
 	typedef struct {
@@ -159,7 +161,7 @@ get_random_info(char seed[16])
 
 	/* MD5 it */
 	MD5Init(&c);
-	MD5Update(&c, &r, sizeof r);
+	MD5Update(&c, (unsigned char *)&r, sizeof r);
 	MD5Final(seed, &c);
 };
 
diff --git a/upnp/src/uuid/uuid.c b/upnp/src/uuid/uuid.c
index 06bae39..5861976 100644
--- a/upnp/src/uuid/uuid.c
+++ b/upnp/src/uuid/uuid.c
@@ -320,7 +320,7 @@ uuid_create_from_name( uuid_upnp * uid, /* resulting UUID */
     net_nsid.time_hi_and_version=htons( net_nsid.time_hi_and_version );
 
     MD5Init( &c );
-    MD5Update( &c, &net_nsid, sizeof( uuid_upnp ) );
+    MD5Update( &c, (unsigned char *)&net_nsid, sizeof(uuid_upnp) );
     MD5Update( &c, name, namelen );
     MD5Final( hash, &c );