diff --git a/common/JackMidiPort.cpp b/common/JackMidiPort.cpp
index babee324..82d00a19 100644
--- a/common/JackMidiPort.cpp
+++ b/common/JackMidiPort.cpp
@@ -99,7 +99,11 @@ static void MidiBufferMixdown(void* mixbuffer, void** src_buffers, int src_count
     }
     mix->Reset(nframes);
 
+#if _MSC_VER
+    uint32_t* mix_index = (uint32_t*)_alloca(sizeof(uint32_t) * src_count);
+#else
     uint32_t mix_index[src_count];
+#endif
     int event_count = 0;
     for (int i = 0; i < src_count; ++i) {
         JackMidiBuffer* buf = static_cast<JackMidiBuffer*>(src_buffers[i]);
diff --git a/common/JackNetOneDriver.cpp b/common/JackNetOneDriver.cpp
index a7fc083e..68e3d052 100644
--- a/common/JackNetOneDriver.cpp
+++ b/common/JackNetOneDriver.cpp
@@ -44,6 +44,10 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 #include <opus/opus_custom.h>
 #endif
 
+#ifdef _MSC_VER
+#define alloca _alloca
+#endif
+
 #define MIN(x,y) ((x)<(y) ? (x) : (y))
 
 using namespace std;
diff --git a/common/netjack.c b/common/netjack.c
index bf937332..74f6be93 100644
--- a/common/netjack.c
+++ b/common/netjack.c
@@ -63,6 +63,10 @@ $Id: net_driver.c,v 1.17 2006/04/16 20:16:10 torbenh Exp $
 
 #define MIN(x,y) ((x)<(y) ? (x) : (y))
 
+#ifdef _MSC_VER
+#define alloca _alloca
+#endif
+
 static int sync_state = 1;
 static jack_transport_state_t last_transport_state;
 
diff --git a/common/netjack_packet.c b/common/netjack_packet.c
index e7c85024..d008120c 100644
--- a/common/netjack_packet.c
+++ b/common/netjack_packet.c
@@ -86,6 +86,10 @@
 #define jack_error printf
 #endif
 
+#ifdef _MSC_VER
+#define alloca _alloca
+#endif
+
 int fraggo = 0;
 
 void
diff --git a/example-clients/netmaster.c b/example-clients/netmaster.c
index 0245fcb6..0cb66203 100644
--- a/example-clients/netmaster.c
+++ b/example-clients/netmaster.c
@@ -31,6 +31,10 @@
 
 #include <jack/net.h>
 
+#ifdef _MSC_VER
+#define alloca _alloca
+#endif
+
 jack_net_master_t* net;
 
 #define BUFFER_SIZE 512
diff --git a/example-clients/server_control.cpp b/example-clients/server_control.cpp
index 11904335..0caad697 100644
--- a/example-clients/server_control.cpp
+++ b/example-clients/server_control.cpp
@@ -27,6 +27,10 @@
 #include <jack/jack.h>
 #include <jack/control.h>
 
+#ifdef _MSC_VER
+#define alloca _alloca
+#endif
+
 static jackctl_driver_t * jackctl_server_get_driver(jackctl_server_t *server, const char *driver_name)
 {
     const JSList * node_ptr = jackctl_server_get_drivers_list(server);
diff --git a/example-clients/session_notify.c b/example-clients/session_notify.c
index 8f60a5a6..a8821393 100644
--- a/example-clients/session_notify.c
+++ b/example-clients/session_notify.c
@@ -31,6 +31,10 @@
 #include <jack/transport.h>
 #include <jack/session.h>
 
+#ifdef _MSC_VER
+#define alloca _alloca
+#endif
+
 char *package;				/* program name */
 jack_client_t *client;
 
diff --git a/example-clients/showtime.c b/example-clients/showtime.c
index 060fe6a4..7050440b 100644
--- a/example-clients/showtime.c
+++ b/example-clients/showtime.c
@@ -26,6 +26,10 @@
 #include <jack/jack.h>
 #include <jack/transport.h>
 
+#ifdef _MSC_VER
+#define alloca _alloca
+#endif
+
 jack_client_t *client;
 
 static void