diff --git a/subsys/net/lib/openthread/platform/CMakeLists.txt b/subsys/net/lib/openthread/platform/CMakeLists.txt
index 2c9bd472c1b..6fe4a9d5767 100644
--- a/subsys/net/lib/openthread/platform/CMakeLists.txt
+++ b/subsys/net/lib/openthread/platform/CMakeLists.txt
@@ -10,7 +10,7 @@ zephyr_library_sources(
   radio.c
   settings.c
   spi.c
-  uart.c
   )
 
+zephyr_library_sources_ifdef(CONFIG_OPENTHREAD_NCP uart.c)
 zephyr_library_sources_ifdef(CONFIG_OPENTHREAD_SHELL shell.c)