diff --git a/drivers/fastboot/Kconfig b/drivers/fastboot/Kconfig
index d5e4a02..b97c67b 100644
--- a/drivers/fastboot/Kconfig
+++ b/drivers/fastboot/Kconfig
@@ -21,6 +21,13 @@
 	help
 	  This enables the fastboot protocol over UDP.
 
+config UDP_FUNCTION_FASTBOOT_PORT
+	depends on UDP_FUNCTION_FASTBOOT
+	int "Define FASTBOOT UDP port"
+	default 5554
+	help
+	  The fastboot protocol requires a UDP port number.
+
 if FASTBOOT
 
 config FASTBOOT_BUF_ADDR
diff --git a/net/fastboot.c b/net/fastboot.c
index 7e7a601..139233b 100644
--- a/net/fastboot.c
+++ b/net/fastboot.c
@@ -9,9 +9,6 @@
 #include <net.h>
 #include <net/fastboot.h>
 
-/* Fastboot port # defined in spec */
-#define WELL_KNOWN_PORT 5554
-
 enum {
 	FASTBOOT_ERROR = 0,
 	FASTBOOT_QUERY = 1,
@@ -310,7 +307,7 @@
 	printf("Using %s device\n", eth_get_name());
 	printf("Listening for fastboot command on %pI4\n", &net_ip);
 
-	fastboot_our_port = WELL_KNOWN_PORT;
+	fastboot_our_port = CONFIG_UDP_FUNCTION_FASTBOOT_PORT;
 
 #if CONFIG_IS_ENABLED(FASTBOOT_FLASH)
 	fastboot_set_progress_callback(fastboot_timed_send_info);