diff --git a/components/bootloader_support/src/esp32/secure_boot_signatures.c b/components/bootloader_support/src/esp32/secure_boot_signatures.c
index 7051de9e79..1ff4999b85 100644
--- a/components/bootloader_support/src/esp32/secure_boot_signatures.c
+++ b/components/bootloader_support/src/esp32/secure_boot_signatures.c
@@ -166,6 +166,8 @@ esp_err_t esp_secure_boot_verify_rsa_signature_block(const ets_secure_boot_signa
                 return ESP_ERR_INVALID_STATE;
             }
         }
+
+        ESP_FAULT_ASSERT(!ets_use_secure_boot_v2());
 #endif
 
         memcpy(efuse_trusted_digest, sig_block_trusted_digest, DIGEST_LEN);