diff --git a/Makefile.ctr b/Makefile.ctr
index 2926ce1947..dfe5506844 100644
--- a/Makefile.ctr
+++ b/Makefile.ctr
@@ -100,7 +100,7 @@ else
 	#HAVE_SOCKET_LEGACY = 1
 	HAVE_THREADS = 1
 	#HAVE_SSL = 1
-	#HAVE_BUILTINMBEDTLS = 1
+	HAVE_BUILTINMBEDTLS = 1
 	HAVE_CORE_INFO_CACHE = 1
 
 	include Makefile.common
diff --git a/deps/mbedtls/mbedtls/config.h b/deps/mbedtls/mbedtls/config.h
index fa1a83897f..8c566e2a81 100644
--- a/deps/mbedtls/mbedtls/config.h
+++ b/deps/mbedtls/mbedtls/config.h
@@ -28,6 +28,14 @@
 #ifndef MBEDTLS_CONFIG_H
 #define MBEDTLS_CONFIG_H
 
+#ifdef _3DS
+#define unix
+#define MBEDTLS_NO_IPV6
+#ifndef _SOCKLEN_T_DECLARED
+#define _SOCKLEN_T_DECLARED
+#endif
+#endif
+
 #if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_DEPRECATE)
 #define _CRT_SECURE_NO_DEPRECATE 1
 #endif
@@ -2020,7 +2028,9 @@
  *
  * This module is used by the HAVEGE random number generator.
  */
+#ifndef _3DS
 #define MBEDTLS_TIMING_C
+#endif
 
 /**
  * \def MBEDTLS_VERSION_C
diff --git a/deps/mbedtls/net_sockets.c b/deps/mbedtls/net_sockets.c
index fc1aaa6ef4..a05b0c26df 100644
--- a/deps/mbedtls/net_sockets.c
+++ b/deps/mbedtls/net_sockets.c
@@ -400,6 +400,7 @@ int mbedtls_net_accept( mbedtls_net_context *bind_ctx,
 
             memcpy( client_ip, &addr4->sin_addr.s_addr, *ip_len );
         }
+#ifndef MBEDTLS_NO_IPV6
         else
         {
             struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) &client_addr;
@@ -410,6 +411,7 @@ int mbedtls_net_accept( mbedtls_net_context *bind_ctx,
 
             memcpy( client_ip, &addr6->sin6_addr.s6_addr, *ip_len);
         }
+#endif
     }
 
     return( 0 );
diff --git a/deps/rcheevos/src/rc_compat.c b/deps/rcheevos/src/rc_compat.c
index e3e6371605..9477c79cf7 100644
--- a/deps/rcheevos/src/rc_compat.c
+++ b/deps/rcheevos/src/rc_compat.c
@@ -3,6 +3,10 @@
 #include <ctype.h>
 #include <stdarg.h>
 
+#if defined(_3DS) && !defined(_POSIX_THREADS)
+#include <../rthreads/ctr_pthread.h>
+#endif
+
 #ifdef RC_C89_HELPERS
 
 int rc_strncasecmp(const char* left, const char* right, size_t length)
diff --git a/libretro-common/net/net_socket_ssl_mbed.c b/libretro-common/net/net_socket_ssl_mbed.c
index 41abada776..ce3ec2a1ef 100644
--- a/libretro-common/net/net_socket_ssl_mbed.c
+++ b/libretro-common/net/net_socket_ssl_mbed.c
@@ -25,6 +25,11 @@
 #include <net/net_socket.h>
 #include <net/net_socket_ssl.h>
 
+#ifdef _3DS
+#include <3ds/types.h>
+#include <3ds/services/ps.h>
+#endif
+
 #if defined(HAVE_BUILTINMBEDTLS)
 #include "../../deps/mbedtls/mbedtls/config.h"
 #include "../../deps/mbedtls/mbedtls/certs.h"
@@ -76,6 +81,15 @@ static void ssl_debug(void *ctx, int level,
    fflush((FILE*)ctx);
 }
 
+#ifdef _3DS
+int ctr_entropy_func(void *data, unsigned char *buffer, size_t size)
+{
+   (void)data;
+   PS_GenerateRandomBytes(buffer, size);
+   return 0;
+}
+#endif
+
 void* ssl_socket_init(int fd, const char *domain)
 {
    static const char *pers = "libretro";
@@ -98,7 +112,13 @@ void* ssl_socket_init(int fd, const char *domain)
 
    state->net_ctx.fd = fd;
 
-   if (mbedtls_ctr_drbg_seed(&state->ctr_drbg, mbedtls_entropy_func, &state->entropy, (const unsigned char*)pers, strlen(pers)) != 0)
+   if (mbedtls_ctr_drbg_seed(&state->ctr_drbg,
+#ifdef _3DS
+      ctr_entropy_func,
+#else
+      mbedtls_entropy_func,
+#endif
+      &state->entropy, (const unsigned char*)pers, strlen(pers)) != 0)
       goto error;
 
 #if defined(MBEDTLS_X509_CRT_PARSE_C)