diff --git a/samples/cellular/at_client/prj.conf b/samples/cellular/at_client/prj.conf
index 36656414bfa0..cff74317d9d5 100644
--- a/samples/cellular/at_client/prj.conf
+++ b/samples/cellular/at_client/prj.conf
@@ -24,3 +24,5 @@ CONFIG_UART_INTERRUPT_DRIVEN=y
 CONFIG_MAIN_STACK_SIZE=3072
 CONFIG_HEAP_MEM_POOL_SIZE=16384
 CONFIG_AT_MONITOR_HEAP_SIZE=512
+
+CONFIG_UART_NRFX_UARTE_LEGACY_SHIM=n