diff --git a/include/mbedtls/psa_util.h b/include/mbedtls/psa_util.h
index 9c7557c..aa6c461 100644
--- a/include/mbedtls/psa_util.h
+++ b/include/mbedtls/psa_util.h
@@ -349,7 +349,7 @@
     int16_t mbedtls_error;
 } error_pair_t;
 
-#if !defined(MBEDTLS_MD_C) || !defined(MBEDTLS_MD5_C)
+#if !defined(MBEDTLS_MD_C) || !defined(MBEDTLS_MD5_C) || defined(MBEDTLS_USE_PSA_CRYPTO)
 extern const error_pair_t psa_to_md_errors[4];
 #endif