diff --git a/boot/zephyr/main.c b/boot/zephyr/main.c
index a57fba5..36c022a 100644
--- a/boot/zephyr/main.c
+++ b/boot/zephyr/main.c
@@ -182,6 +182,7 @@
     __set_MSP(vt->msp);
 #if CONFIG_MCUBOOT_CLEANUP_ARM_CORE
     __set_CONTROL(0x00); /* application will configures core on its own */
+    __ISB();
 #endif
     ((void (*)(void))vt->reset)();
 }