diff --git a/monitor/bt.h b/monitor/bt.h
index 64cbe74..0949b1d 100644
--- a/monitor/bt.h
+++ b/monitor/bt.h
@@ -690,6 +690,14 @@ struct bt_hci_cmd_write_le_host_supported {
 	uint8_t  simultaneous;
 } __attribute__ ((packed));
 
+#define BT_HCI_CMD_READ_SYNC_TRAIN_PARAMS	0x0c77
+struct bt_hci_rsp_read_sync_train_params {
+	uint8_t  status;
+	uint16_t interval;
+	uint32_t timeout;
+	uint8_t  service_data;
+} __attribute__ ((packed));
+
 #define BT_HCI_CMD_READ_LOCAL_VERSION		0x1001
 struct bt_hci_rsp_read_local_version {
 	uint8_t  status;
diff --git a/monitor/packet.c b/monitor/packet.c
index 80f5a06..c2f1015 100644
--- a/monitor/packet.c
+++ b/monitor/packet.c
@@ -3238,6 +3238,17 @@ static void write_le_host_supported_cmd(const void *data, uint8_t size)
 	print_field("Simultaneous: 0x%2.2x", cmd->simultaneous);
 }
 
+static void read_sync_train_params_rsp(const void *data, uint8_t size)
+{
+	const struct bt_hci_rsp_read_sync_train_params *rsp = data;
+
+	print_status(rsp->status);
+	print_interval(rsp->interval);
+	print_field("Timeout: %.3f msec (0x%8.8x)",
+			btohl(rsp->timeout) * 0.625, btohl(rsp->timeout));
+	print_field("Service Data: 0x%2.2x", rsp->service_data);
+}
+
 static void read_local_version_rsp(const void *data, uint8_t size)
 {
 	const struct bt_hci_rsp_read_local_version *rsp = data;
@@ -4075,7 +4086,9 @@ static const struct opcode_data opcode_table[] = {
 	{ 0x0c74, 252, "Set Reserved LT_ADDR" },
 	{ 0x0c75, 253, "Delete Reserved LT_ADDR" },
 	{ 0x0c76, 254, "Set Connectionless Slave Broadcast Data" },
-	{ 0x0c77, 255, "Read Synchronization Train Parameters" },
+	{ 0x0c77, 255, "Read Synchronization Train Parameters",
+				null_cmd, 0, true,
+				read_sync_train_params_rsp, 8, true },
 	{ 0x0c78, 256, "Write Synchronization Train Parameters" },
 
 	/* OGF 4 - Information Parameter */