diff --git a/include/mbedtls/build_info.h b/include/mbedtls/build_info.h
index 21e63f1..b043789 100644
--- a/include/mbedtls/build_info.h
+++ b/include/mbedtls/build_info.h
@@ -79,11 +79,12 @@
  * and also even without USE_PSA_CRYPTO for mbedtls_pk_sign_ext().
  * PSA crypto also needs pk_write to export RSA keys (otherwise the build
  * goes through but psa_export_key() and psa_export_public_key() fail on
- * RSA keys).
+ * RSA keys), and pk_parse to work with RSA keys in almost any way.
  */
 #if defined(MBEDTLS_PSA_CRYPTO_C) && defined(MBEDTLS_RSA_C)
 #define MBEDTLS_PK_C
 #define MBEDTLS_PK_WRITE_C
+#define MBEDTLS_PK_PARSE_C
 #endif
 
 /* Under MBEDTLS_USE_PSA_CRYPTO, the pk module needs pk_write functions