diff --git a/boot/zephyr/main.c b/boot/zephyr/main.c
index 9cd0d0a..3ea203b 100644
--- a/boot/zephyr/main.c
+++ b/boot/zephyr/main.c
@@ -545,7 +545,7 @@
         /* at least one check if time was expired */
         timeout_in_ms = 1;
     }
-   boot_serial_check_start(&boot_funcs,timeout_in_ms);
+    boot_serial_check_start(&boot_funcs,timeout_in_ms);
 #endif
 
     if (fih_not_eq(fih_rc, FIH_SUCCESS)) {