diff --git a/bad.c b/bad.c
index b38635d..c1631de 100644
--- a/bad.c
+++ b/bad.c
@@ -195,6 +195,9 @@ static int handle_stdin(int fd, void *buf)
 		case MSG_VBUS_OFF:
 			device_vbus(selected_device, false);
 			break;
+		case MSG_SEND_BREAK:
+			device_send_break(selected_device);
+			break;
 		default:
 			fprintf(stderr, "unk %d len %d\n", msg->type, msg->len);
 			exit(1);
diff --git a/cdb_assist.c b/cdb_assist.c
index 9d86bdd..34ae1ec 100644
--- a/cdb_assist.c
+++ b/cdb_assist.c
@@ -542,8 +542,10 @@ int cdb_target_write(struct device *dev, const void *buf, size_t len)
 	return write(cdb->target_tty, buf, len);
 }
 
-void cdb_target_break(struct cdb_assist *cdb)
+void cdb_send_break(struct device *dev)
 {
+	struct cdb_assist *cdb = dev->cdb;
+
 	tcsendbreak(cdb->target_tty, 0);
 }
 
diff --git a/cdb_assist.h b/cdb_assist.h
index ec94029..9269c27 100644
--- a/cdb_assist.h
+++ b/cdb_assist.h
@@ -15,7 +15,7 @@ int cdb_assist_power_off(struct device *dev);
 void cdb_assist_vbus(struct device *dev, bool on);
 void cdb_gpio(struct cdb_assist *cdb, int gpio, bool on);
 int cdb_target_write(struct device *dev, const void *buf, size_t len);
-void cdb_target_break(struct cdb_assist *cdb);
+void cdb_send_break(struct device *dev);
 unsigned int cdb_vref(struct cdb_assist *cdb);
 void cdb_assist_print_status(struct device *dev);
 void cdb_set_voltage(struct cdb_assist *cdb, unsigned mV);
diff --git a/cdba.c b/cdba.c
index 9c7cf73..9ed15c5 100644
--- a/cdba.c
+++ b/cdba.c
@@ -193,11 +193,11 @@ static int tty_callback(int *ssh_fds)
 				write(ssh_fds[0], &hdr, sizeof(hdr));
 				write(ssh_fds[0], "\001", 1);
 				break;
-#if 0
-			case 'b':
-				device_break(device);
+			case 'B':
+				hdr.type = MSG_SEND_BREAK;
+				hdr.len = 0;
+				write(ssh_fds[0], &hdr, sizeof(hdr));
 				break;
-#endif
 			}
 
 			special = false;
diff --git a/cdba.h b/cdba.h
index adbb44c..24582f6 100644
--- a/cdba.h
+++ b/cdba.h
@@ -27,6 +27,7 @@ enum {
 	MSG_VBUS_ON,
 	MSG_VBUS_OFF,
 	MSG_FASTBOOT_REBOOT,
+	MSG_SEND_BREAK,
 };
 
 #endif
diff --git a/device.c b/device.c
index a51bebb..3ea90a6 100644
--- a/device.c
+++ b/device.c
@@ -173,3 +173,9 @@ void device_fastboot_key(struct device *device, bool on)
 	if (device->fastboot_key)
 		device->fastboot_key(device, on);
 }
+
+void device_send_break(struct device *device)
+{
+	if (device->send_break)
+		device->send_break(device);
+}
diff --git a/device.h b/device.h
index 915ed9d..bbb9f02 100644
--- a/device.h
+++ b/device.h
@@ -28,6 +28,7 @@ struct device {
 	void (*vbus)(struct device *dev, bool on);
 	int (*write)(struct device *dev, const void *buf, size_t len);
 	void (*fastboot_key)(struct device *dev, bool on);
+	void (*send_break)(struct device *dev);
 	bool set_active;
 
 	void *cdb;
@@ -50,5 +51,6 @@ void device_boot(struct device *device, const void *data, size_t len);
 void device_fastboot_boot(struct device *device);
 void device_fastboot_flash_reboot(struct device *device);
 void device_fastboot_key(struct device *device, bool on);
+void device_send_break(struct device *device);
 
 #endif
diff --git a/device_parser.c b/device_parser.c
index 5fd6555..14d7b95 100644
--- a/device_parser.c
+++ b/device_parser.c
@@ -103,6 +103,7 @@ static void parse_board(struct device_parser *dp)
 			dev->vbus = cdb_assist_vbus;
 			dev->write = cdb_target_write;
 			dev->fastboot_key = cdb_fastboot_key;
+			dev->send_break = cdb_send_break;
 		} else if (!strcmp(key, "conmux")) {
 			dev->cdb_serial = strdup(value);