diff --git a/drivers/mmi_muc_uart/muc_protocol.h b/drivers/mmi_muc_uart/muc_protocol.h
index f13e88390313..a10988706cab 100644
--- a/drivers/mmi_muc_uart/muc_protocol.h
+++ b/drivers/mmi_muc_uart/muc_protocol.h
@@ -48,6 +48,7 @@ struct mmi_uart_pb_hdr_t {
 #define BOOT_MODE             0x0007
 #define MUC_FW_VERSION        0x0008
 #define MUC_SET_GPIO          0x0009
+#define MUC_DEBUG_MSG         0x0010
 
 /* MUC gpios */
 #define MUC_GPIO_1            35
diff --git a/drivers/mmi_muc_uart/muc_uart.c b/drivers/mmi_muc_uart/muc_uart.c
index 44c6843ab0c2..75307de9ee43 100644
--- a/drivers/mmi_muc_uart/muc_uart.c
+++ b/drivers/mmi_muc_uart/muc_uart.c
@@ -1164,6 +1164,15 @@ static void muc_uart_handle_message(struct mod_muc_data_t *mm_data,
 			muc_uart_send(mm_data, hdr->cmd|MSG_ACK_MASK, NULL, 0);
 			break;
 		}
+		case MUC_DEBUG_MSG: {
+			if (payload_len) {
+				/* Ensure null terminated */
+				payload[payload_len - 1] = '\0';
+				MUC_LOG("muc_dbg_msg: %s\n", (char *)payload);
+			}
+			muc_uart_send(mm_data, hdr->cmd|MSG_ACK_MASK, NULL, 0);
+			break;
+		}
 		default: {
 			if (hdr->cmd & MSG_ACK_MASK)
 				clear_wait_for_ack(mm_data);