diff --git a/boards/posix/nrf_bsim/Kconfig.defconfig b/boards/posix/nrf_bsim/Kconfig.defconfig
index d4e48ada7ad3b8..99ad7af5ac3d76 100644
--- a/boards/posix/nrf_bsim/Kconfig.defconfig
+++ b/boards/posix/nrf_bsim/Kconfig.defconfig
@@ -91,4 +91,7 @@ config POSIX_ARCH_CONSOLE
 
 endif # CONSOLE
 
+config UART_NRFX_UARTE_LEGACY_SHIM
+	default y
+
 endif # SOC_SERIES_BSIM_NRFXX