diff --git a/boot/boot_serial/src/boot_serial.c b/boot/boot_serial/src/boot_serial.c
index 664af2386..4b3ccce74 100644
--- a/boot/boot_serial/src/boot_serial.c
+++ b/boot/boot_serial/src/boot_serial.c
@@ -596,8 +596,8 @@ static off_t erase_range(const struct flash_area *fap, off_t start, off_t end)
     }
 
     size = flash_sector_get_off(&sect) + flash_sector_get_size(&sect) - start;
-    BOOT_LOG_INF("Erasing range 0x%jx:0x%jx", (intmax_t)start,
-		 (intmax_t)(start + size - 1));
+    BOOT_LOG_INF("Erasing range 0x%jx:0x%jx", (intmax_t)(fap->fa_off + start),
+		 (intmax_t)(fap->fa_off + start + size - 1));
 
     rc = flash_area_erase(fap, start, size);
     if (rc != 0) {
@@ -781,7 +781,8 @@ bs_upload(char *buf, int len)
         rem_bytes = 0;
     }
 
-    BOOT_LOG_INF("Writing at 0x%x until 0x%x", curr_off, curr_off + img_chunk_len);
+    BOOT_LOG_INF("Writing at 0x%lx until 0x%lx", fap->fa_off + curr_off,
+                 fap->fa_off + curr_off + img_chunk_len);
     /* Write flash aligned chunk, note that img_chunk_len now holds aligned length */
 #if defined(MCUBOOT_SERIAL_UNALIGNED_BUFFER_SIZE) && MCUBOOT_SERIAL_UNALIGNED_BUFFER_SIZE > 0
     if (flash_area_align(fap) > 1 &&