diff --git a/boot/zephyr/include/target.h b/boot/zephyr/include/target.h
index 7c86ff3..e71bfb5 100644
--- a/boot/zephyr/include/target.h
+++ b/boot/zephyr/include/target.h
@@ -38,8 +38,10 @@
 #error "Target support is incomplete; cannot build mcuboot."
 #endif
 
-#if (MCUBOOT_IMAGE_NUMBER == 2) && (!(FLASH_AREA_LABEL_EXISTS(image_2)) || \
-                                     !(FLASH_AREA_LABEL_EXISTS(image_3)))
+#if ((MCUBOOT_IMAGE_NUMBER == 2) && (!defined(FLASH_AREA_IMAGE_2_OFFSET) || \
+                                     !defined(FLASH_AREA_IMAGE_2_SIZE)   || \
+                                     !defined(FLASH_AREA_IMAGE_3_OFFSET) || \
+                                     !defined(FLASH_AREA_IMAGE_3_SIZE)))
 #error "Target support is incomplete; cannot build mcuboot."
 #endif