diff --git a/boot/bootutil/src/image_validate.c b/boot/bootutil/src/image_validate.c
index 0740b8ed9..da671a2d9 100644
--- a/boot/bootutil/src/image_validate.c
+++ b/boot/bootutil/src/image_validate.c
@@ -368,6 +368,7 @@ static const uint16_t allowed_unprot_tlvs[] = {
      IMAGE_TLV_ENC_KW,
      IMAGE_TLV_ENC_EC256,
      IMAGE_TLV_ENC_X25519,
+     IMAGE_TLV_SEC_CNT,
      /* Mark end with ANY. */
      IMAGE_TLV_ANY,
 };