diff --git a/boards/arm/frdm_k64f/Kconfig.defconfig b/boards/arm/frdm_k64f/Kconfig.defconfig
index 4e5a9d5a215..2a3edd70fa1 100644
--- a/boards/arm/frdm_k64f/Kconfig.defconfig
+++ b/boards/arm/frdm_k64f/Kconfig.defconfig
@@ -88,7 +88,7 @@ endif
 endif # UART_K20
 
 config BLUETOOTH_UART_ON_DEV_NAME
-	default "UART_1" if BLUETOOTH_UART
+	default "UART_3" if BLUETOOTH_UART
 
 config PINMUX
 	def_bool y