diff --git a/libs/backends/jack/weak_libjack.c b/libs/backends/jack/weak_libjack.c
index 10f2fdf6e2..b02c01a2c1 100644
--- a/libs/backends/jack/weak_libjack.c
+++ b/libs/backends/jack/weak_libjack.c
@@ -53,7 +53,7 @@ static void* lib_symbol(void* const lib, const char* const sym) {
 #endif
 }
 
-#ifdef COMPILER_MSVC
+#if defined _MSC_VER  && ! defined __INTEL_COMPILER
 typedef void * pvoid_t;
 #define MAPSYM(SYM, FAIL) _j._ ## SYM = (func_t)lib_symbol(lib, "jack_" # SYM); \
 	if (!_j._ ## SYM) err |= FAIL;
@@ -92,8 +92,9 @@ static struct WeakJack {
 } _j;
 
 static int _status = -1;
-
+#if !defined _MSC_VER || defined __INTEL_COMPILER
 __attribute__((constructor))
+#endif
 static void init_weak_jack(void)
 {
 	void* lib;
@@ -110,7 +111,7 @@ static void init_weak_jack(void)
 		lib = lib_open("/usr/local/lib/libjack.dylib");
 	}
 #elif (defined PLATFORM_WINDOWS)
-# if ( defined(__x86_64__) || defined(_M_X64) )
+# if defined(__x86_64__) || defined(_M_X64) || defined(__amd64__)
 	lib = lib_open("libjack64.dll");
 # else
 	lib = lib_open("libjack.dll");
diff --git a/libs/backends/jack/weak_libjack.def b/libs/backends/jack/weak_libjack.def
index 4a8d9e8de9..8ba4fbd383 100644
--- a/libs/backends/jack/weak_libjack.def
+++ b/libs/backends/jack/weak_libjack.def
@@ -32,6 +32,8 @@ JVFUN(1,                 set_info_function, (void (*f)(const char *)), (f),)
 JCFUN(1, int,            activate, -1)
 JCFUN(1, int,            deactivate, -1)
 
+JPFUN(1, int,            client_name_size, (), (), 32)
+
 JCFUN(1, jack_nframes_t, get_sample_rate, 0)
 JCFUN(1, jack_nframes_t, get_buffer_size, 0)
 JPFUN(1, jack_nframes_t, frames_since_cycle_start, (const jack_client_t *c), (c), 0)
@@ -58,6 +60,7 @@ JPFUN(1, const char*,    port_name, (const jack_port_t *p), (p), NULL)
 JPFUN(1, const char*,    port_short_name, (const jack_port_t *p), (p), NULL)
 JPFUN(1, int,            port_flags, (const jack_port_t *p), (p), 0)
 JPFUN(1, int,            port_is_mine, (const jack_client_t *c, const jack_port_t *p), (c,p), 0)
+JPFUN(1, int,            port_connected, (const jack_port_t *p), (p), 0)
 JPFUN(1, const char**,   get_ports,(jack_client_t *c, const char *p, const char *t, unsigned long f), (c,p,t,f), NULL)
 JPFUN(1, int,            port_name_size, (void), (), 0)
 JPFUN(1, int,            port_type_size, (void), (), 0)
@@ -70,7 +73,10 @@ JPFUN(1, const char *,   port_type, (const jack_port_t *p), (p), 0)
 JPFUN(1, const char **,  port_get_connections, (const jack_port_t *p), (p), 0)
 JPFUN(1, const char **,  port_get_all_connections, (const jack_client_t *c, const jack_port_t *p), (c,p), 0)
 JPFUN(1, int,            port_set_name, (jack_port_t *p, const char *n), (p,n), -1)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 JXFUN(0, int,            port_rename, (jack_client_t *c, jack_port_t *p, const char *n), (c,p,n), return jack_port_set_name (p,n);)
+#pragma GCC diagnostic pop
 JPFUN(1, int,            port_get_aliases, (const jack_port_t *port, char* const aliases[2]), (port,aliases), 0)
 JPFUN(1, int,            port_disconnect, (jack_client_t *c, jack_port_t *p), (c,p), 0)
 JPFUN(1, int,            connect, (jack_client_t *c, const char *s, const char *d), (c,s,d), -1)
@@ -89,6 +95,7 @@ JPFUN(1, jack_nframes_t, get_current_transport_frame, (const jack_client_t *c),
 JXFUN(1, jack_transport_state_t, transport_query, (const jack_client_t *c, jack_position_t *p), (c,p), memset(p, 0, sizeof(jack_position_t)); return JackTransportStopped;)
 JPFUN(1, int,            set_sync_callback, (jack_client_t *c, JackSyncCallback p, void *a), (c,p,a), -1)
 JPFUN(1, int,            set_timebase_callback, (jack_client_t *c, int l, JackTimebaseCallback p, void *a), (c,l,p,a), -1)
+JPFUN(1, int,            set_sync_timeout, (jack_client_t *c, jack_time_t t), (c,t), -1)
 JCFUN(1, int,            release_timebase, 0)
 
 /* <jack/midiport.h> */
@@ -124,7 +131,7 @@ JPFUN(0, int,            acquire_real_time_scheduling, (jack_native_thread_t t,
 JPFUN(0, int,            drop_real_time_scheduling, (jack_native_thread_t t), (t), 0)
 JPFUN(0, int,            client_stop_thread, (jack_client_t* c, jack_native_thread_t t), (c,t), 0)
 JPFUN(0, int,            client_kill_thread, (jack_client_t* c, jack_native_thread_t t), (c,t), 0)
-#ifndef WIN32
+#ifndef _WIN32
 JVFUN(0,                 set_thread_creator, (jack_thread_creator_t c), (c),)
 #endif
 JPFUN(1, int,            client_create_thread, \
diff --git a/libs/backends/jack/weak_libjack.h b/libs/backends/jack/weak_libjack.h
index d5025d2c07..15a6fb8b55 100644
--- a/libs/backends/jack/weak_libjack.h
+++ b/libs/backends/jack/weak_libjack.h
@@ -59,6 +59,8 @@ int have_libjack(void);
 #define jack_cpu_load                       WJACK_cpu_load
 #define jack_is_realtime                    WJACK_is_realtime
 
+#define jack_client_name_size               WJACK_client_name_size
+
 #define jack_set_freewheel                  WJACK_set_freewheel
 #define jack_set_buffer_size                WJACK_set_buffer_size
 
@@ -92,6 +94,7 @@ int have_libjack(void);
 #define jack_port_short_name                WJACK_port_short_name
 #define jack_port_flags                     WJACK_port_flags
 #define jack_port_is_mine                   WJACK_port_is_mine
+#define jack_port_connected                 WJACK_port_connected
 #define jack_get_ports                      WJACK_get_ports
 #define jack_port_name_size                 WJACK_port_name_size
 #define jack_port_type_size                 WJACK_port_type_size