diff --git a/src/jtag/adapter.c b/src/jtag/adapter.c
index b1be28e5f..29a961338 100644
--- a/src/jtag/adapter.c
+++ b/src/jtag/adapter.c
@@ -126,16 +126,7 @@ COMMAND_HANDLER(handle_interface_command)
 
 		jtag_interface = jtag_interfaces[i];
 
-		/* LEGACY SUPPORT ... adapter drivers  must declare what
-		 * transports they allow.  Until they all do so, assume
-		 * the legacy drivers are JTAG-only
-		 */
-		if (!jtag_interface->transports)
-			LOG_WARNING("Adapter driver '%s' did not declare "
-				"which transports it allows; assuming "
-				"legacy JTAG-only", jtag_interface->name);
-		return allow_transports(CMD_CTX, jtag_interface->transports
-						? jtag_interface->transports : jtag_only);
+		return allow_transports(CMD_CTX, jtag_interface->transports);
 	}
 
 	/* no valid interface was found (i.e. the configuration option,
diff --git a/src/jtag/core.c b/src/jtag/core.c
index 84e939677..18956f24d 100644
--- a/src/jtag/core.c
+++ b/src/jtag/core.c
@@ -1348,19 +1348,6 @@ int adapter_init(struct command_context *cmd_ctx)
 		return retval;
 	jtag = jtag_interface;
 
-	/* LEGACY SUPPORT ... adapter drivers  must declare what
-	 * transports they allow.  Until they all do so, assume
-	 * the legacy drivers are JTAG-only
-	 */
-	if (!transports_are_declared()) {
-		LOG_ERROR("Adapter driver '%s' did not declare "
-			"which transports it allows; assuming "
-			"JTAG-only", jtag->name);
-		retval = allow_transports(cmd_ctx, jtag_only);
-		if (retval != ERROR_OK)
-			return retval;
-	}
-
 	if (jtag->speed == NULL) {
 		LOG_INFO("This adapter doesn't support configurable speed");
 		return ERROR_OK;
diff --git a/src/jtag/drivers/amt_jtagaccel.c b/src/jtag/drivers/amt_jtagaccel.c
index d6864c210..045672f0e 100644
--- a/src/jtag/drivers/amt_jtagaccel.c
+++ b/src/jtag/drivers/amt_jtagaccel.c
@@ -586,6 +586,7 @@ static const struct command_registration amtjtagaccel_command_handlers[] = {
 
 struct jtag_interface amt_jtagaccel_interface = {
 	.name = "amt_jtagaccel",
+	.transports = jtag_only,
 	.commands = amtjtagaccel_command_handlers,
 
 	.init = amt_jtagaccel_init,
diff --git a/src/jtag/drivers/at91rm9200.c b/src/jtag/drivers/at91rm9200.c
index 0360ec5de..ac655635d 100644
--- a/src/jtag/drivers/at91rm9200.c
+++ b/src/jtag/drivers/at91rm9200.c
@@ -192,6 +192,7 @@ static const struct command_registration at91rm9200_command_handlers[] = {
 struct jtag_interface at91rm9200_interface = {
 	.name = "at91rm9200",
 	.execute_queue = bitbang_execute_queue,
+	.transports = jtag_only,
 	.commands = at91rm9200_command_handlers,
 	.init = at91rm9200_init,
 	.quit = at91rm9200_quit,
diff --git a/src/jtag/drivers/ep93xx.c b/src/jtag/drivers/ep93xx.c
index 36fc77747..4cf318485 100644
--- a/src/jtag/drivers/ep93xx.c
+++ b/src/jtag/drivers/ep93xx.c
@@ -55,6 +55,7 @@ struct jtag_interface ep93xx_interface = {
 
 	.supported = DEBUG_CAP_TMS_SEQ,
 	.execute_queue = bitbang_execute_queue,
+	.transports = jtag_only,
 
 	.init = ep93xx_init,
 	.quit = ep93xx_quit,
diff --git a/src/jtag/drivers/gw16012.c b/src/jtag/drivers/gw16012.c
index 2971d4663..e65f56cd1 100644
--- a/src/jtag/drivers/gw16012.c
+++ b/src/jtag/drivers/gw16012.c
@@ -523,6 +523,7 @@ static const struct command_registration gw16012_command_handlers[] = {
 
 struct jtag_interface gw16012_interface = {
 	.name = "gw16012",
+	.transports = jtag_only,
 	.commands = gw16012_command_handlers,
 
 	.init = gw16012_init,
diff --git a/src/jtag/drivers/opendous.c b/src/jtag/drivers/opendous.c
index c0595bf9f..5f352af89 100644
--- a/src/jtag/drivers/opendous.c
+++ b/src/jtag/drivers/opendous.c
@@ -236,6 +236,7 @@ static const struct command_registration opendous_command_handlers[] = {
 
 struct jtag_interface opendous_interface = {
 	.name = "opendous",
+	.transports = jtag_only,
 	.commands = opendous_command_handlers,
 	.execute_queue = opendous_execute_queue,
 	.init = opendous_init,
diff --git a/src/jtag/drivers/openjtag.c b/src/jtag/drivers/openjtag.c
index 2ca8254b7..7a3aa2337 100644
--- a/src/jtag/drivers/openjtag.c
+++ b/src/jtag/drivers/openjtag.c
@@ -894,6 +894,7 @@ static const struct command_registration openjtag_command_handlers[] = {
 
 struct jtag_interface openjtag_interface = {
 	.name = "openjtag",
+	.transports = jtag_only,
 	.commands = openjtag_command_handlers,
 
 	.execute_queue = openjtag_execute_queue,
diff --git a/src/jtag/drivers/parport.c b/src/jtag/drivers/parport.c
index 0e7992fe9..8e44dcb79 100644
--- a/src/jtag/drivers/parport.c
+++ b/src/jtag/drivers/parport.c
@@ -517,6 +517,7 @@ static const struct command_registration parport_command_handlers[] = {
 struct jtag_interface parport_interface = {
 	.name = "parport",
 	.supported = DEBUG_CAP_TMS_SEQ,
+	.transports = jtag_only,
 	.commands = parport_command_handlers,
 
 	.init = parport_init,
diff --git a/src/jtag/drivers/presto.c b/src/jtag/drivers/presto.c
index 29bc81111..2a94d0618 100644
--- a/src/jtag/drivers/presto.c
+++ b/src/jtag/drivers/presto.c
@@ -563,6 +563,7 @@ static int presto_jtag_quit(void)
 
 struct jtag_interface presto_interface = {
 	.name = "presto",
+	.transports = jtag_only,
 	.commands = presto_command_handlers,
 
 	.execute_queue = bitq_execute_queue,
diff --git a/src/jtag/drivers/remote_bitbang.c b/src/jtag/drivers/remote_bitbang.c
index 1f8fc1a11..a35489487 100644
--- a/src/jtag/drivers/remote_bitbang.c
+++ b/src/jtag/drivers/remote_bitbang.c
@@ -345,6 +345,7 @@ static const struct command_registration remote_bitbang_command_handlers[] = {
 struct jtag_interface remote_bitbang_interface = {
 	.name = "remote_bitbang",
 	.execute_queue = &bitbang_execute_queue,
+	.transports = jtag_only,
 	.commands = remote_bitbang_command_handlers,
 	.init = &remote_bitbang_init,
 	.quit = &remote_bitbang_quit,
diff --git a/src/jtag/drivers/rlink.c b/src/jtag/drivers/rlink.c
index 70f8734b5..317e8b808 100644
--- a/src/jtag/drivers/rlink.c
+++ b/src/jtag/drivers/rlink.c
@@ -1662,6 +1662,7 @@ static int rlink_quit(void)
 
 struct jtag_interface rlink_interface = {
 	.name = "rlink",
+	.transports = jtag_only,
 	.init = rlink_init,
 	.quit = rlink_quit,
 	.speed = rlink_speed,
diff --git a/src/jtag/drivers/usb_blaster/usb_blaster.c b/src/jtag/drivers/usb_blaster/usb_blaster.c
index 55b511e1a..165ebdcd3 100644
--- a/src/jtag/drivers/usb_blaster/usb_blaster.c
+++ b/src/jtag/drivers/usb_blaster/usb_blaster.c
@@ -1068,6 +1068,7 @@ static const struct command_registration ublast_command_handlers[] = {
 
 struct jtag_interface usb_blaster_interface = {
 	.name = "usb_blaster",
+	.transports = jtag_only,
 	.commands = ublast_command_handlers,
 	.supported = DEBUG_CAP_TMS_SEQ,
 
diff --git a/src/jtag/drivers/usbprog.c b/src/jtag/drivers/usbprog.c
index bcbaff8d8..35a95202e 100644
--- a/src/jtag/drivers/usbprog.c
+++ b/src/jtag/drivers/usbprog.c
@@ -598,6 +598,7 @@ static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag)
 
 struct jtag_interface usbprog_interface = {
 	.name = "usbprog",
+	.transports = jtag_only,
 
 	.execute_queue = usbprog_execute_queue,
 	.init = usbprog_init,
diff --git a/src/jtag/minidummy/minidummy.c b/src/jtag/minidummy/minidummy.c
index b7c989fc0..2f260040d 100644
--- a/src/jtag/minidummy/minidummy.c
+++ b/src/jtag/minidummy/minidummy.c
@@ -28,6 +28,7 @@ struct jtag_interface minidummy_interface = {
 	.name = "minidummy",
 	.execute_queue = NULL,
 	.speed = NULL,
+	.transports = jtag_only,
 	.commands = NULL,
 	.init = NULL,
 	.quit = NULL,
diff --git a/src/jtag/zy1000/zy1000.c b/src/jtag/zy1000/zy1000.c
index 4e53dd1f7..173498398 100644
--- a/src/jtag/zy1000/zy1000.c
+++ b/src/jtag/zy1000/zy1000.c
@@ -1242,6 +1242,7 @@ struct jtag_interface zy1000_interface = {
 	.supported = DEBUG_CAP_TMS_SEQ,
 	.execute_queue = NULL,
 	.speed = zy1000_speed,
+	.transports = jtag_only,
 	.commands = zy1000_commands,
 	.init = zy1000_init,
 	.quit = zy1000_quit,