diff --git a/boot/zephyr/main.c b/boot/zephyr/main.c
index 47e118c..517ec60 100644
--- a/boot/zephyr/main.c
+++ b/boot/zephyr/main.c
@@ -51,11 +51,10 @@
 #else
 #include <logging/log_ctrl.h>
 
-#define BOOT_LOG_STACK_SIZE 768
 #define BOOT_LOG_PROCESSING_INTERVAL 30 /* [ms] */
 
 /* log are processing in custom routine */
-K_THREAD_STACK_DEFINE(boot_log_stack, BOOT_LOG_STACK_SIZE);
+K_THREAD_STACK_DEFINE(boot_log_stack, CONFIG_MCUBOOT_LOG_THREAD_STACK_SIZE);
 struct k_thread boot_log_thread;
 volatile bool boot_log_stop = false;
 K_SEM_DEFINE(boot_log_sem, 1, 1);