diff --git a/samples/subsys/zbus/uart_bridge/boards/native_posix_native_64.conf b/samples/subsys/zbus/uart_bridge/boards/native_posix_native_64.conf
new file mode 100644
index 00000000000..b552360756c
--- /dev/null
+++ b/samples/subsys/zbus/uart_bridge/boards/native_posix_native_64.conf
@@ -0,0 +1 @@
+CONFIG_UART_NATIVE_POSIX_PORT_1_ENABLE=y
diff --git a/samples/subsys/zbus/uart_bridge/boards/native_sim_native_64.conf b/samples/subsys/zbus/uart_bridge/boards/native_sim_native_64.conf
new file mode 100644
index 00000000000..b552360756c
--- /dev/null
+++ b/samples/subsys/zbus/uart_bridge/boards/native_sim_native_64.conf
@@ -0,0 +1 @@
+CONFIG_UART_NATIVE_POSIX_PORT_1_ENABLE=y