diff --git a/snippets/nrf91-modem-trace-uart/overlay-modem-trace-uart.conf b/snippets/nrf91-modem-trace-uart/overlay-modem-trace-uart.conf
index c3ad518a50d..e583bac718b 100644
--- a/snippets/nrf91-modem-trace-uart/overlay-modem-trace-uart.conf
+++ b/snippets/nrf91-modem-trace-uart/overlay-modem-trace-uart.conf
@@ -13,3 +13,5 @@ CONFIG_NRF_MODEM_LIB_TRACE_BACKEND_UART_ZEPHYR=y
 # UART configuration
 CONFIG_SERIAL=y
 CONFIG_UART_ASYNC_API=y
+CONFIG_UART_1_ASYNC=y
+CONFIG_UART_1_INTERRUPT_DRIVEN=n