diff --git a/boot/zephyr/single_loader.c b/boot/zephyr/single_loader.c
index 97c212a..86d5052 100644
--- a/boot/zephyr/single_loader.c
+++ b/boot/zephyr/single_loader.c
@@ -350,7 +350,7 @@
     memset(&_bs, 0, sizeof(struct boot_status));
 
     /* Get size from last sector to know page/sector erase size */
-    rc = flash_area_get_sector(fap, boot_status_off(fa_p), &sector);
+    rc = flash_area_get_sector(fa_p, boot_status_off(fa_p), &sector);
 
 
     image_index = BOOT_CURR_IMG(state);