diff --git a/boot/boot_serial/src/boot_serial.c b/boot/boot_serial/src/boot_serial.c
index 1ea009b..bdf3749 100644
--- a/boot/boot_serial/src/boot_serial.c
+++ b/boot/boot_serial/src/boot_serial.c
@@ -178,7 +178,7 @@
         flash_area_read(fap, 0, &hdr, sizeof(hdr));
 
         if (hdr.ih_magic != IMAGE_MAGIC ||
-          bootutil_img_validate(&hdr, fap, tmpbuf, sizeof(tmpbuf),
+          bootutil_img_validate(0, &hdr, fap, tmpbuf, sizeof(tmpbuf),
                                 NULL, 0, NULL)) {
             flash_area_close(fap);
             continue;
diff --git a/boot/boot_serial/test/src/testcases/boot_serial_img_msg.c b/boot/boot_serial/test/src/testcases/boot_serial_img_msg.c
index e2c7dbd..7aa9590 100644
--- a/boot/boot_serial/test/src/testcases/boot_serial_img_msg.c
+++ b/boot/boot_serial/test/src/testcases/boot_serial_img_msg.c
@@ -61,7 +61,7 @@
     /*
      * Validate contents inside the primary slot
      */
-    rc = flash_area_open(FLASH_AREA_IMAGE_PRIMARY, &fap);
+    rc = flash_area_open(FLASH_AREA_IMAGE_PRIMARY(0), &fap);
     assert(rc == 0);
 
     rc = flash_area_read(fap, 0, enc_img, sizeof(img));