diff --git a/boot/zephyr/Kconfig b/boot/zephyr/Kconfig
index bec28c9..2809410 100644
--- a/boot/zephyr/Kconfig
+++ b/boot/zephyr/Kconfig
@@ -357,4 +357,4 @@
 	  only protects against some attacks against version downgrades (for
 	  example, a JTAG could be used to write an older version).
 
-source "$ZEPHYR_BASE/Kconfig.zephyr"
+source "Kconfig.zephyr"