diff --git a/include/psa/crypto_config.h b/include/psa/crypto_config.h
index 4e7a71e..d34cbf3 100644
--- a/include/psa/crypto_config.h
+++ b/include/psa/crypto_config.h
@@ -115,6 +115,8 @@
 #define PSA_WANT_ECC_SECP_K1_256                1
 #define PSA_WANT_ECC_SECP_R1_192                1
 #define PSA_WANT_ECC_SECP_R1_224                1
+/* For secp256r1, consider enabling #MBEDTLS_PSA_P256M_DRIVER_ENABLED
+ * (see the description in mbedtls/mbedtls_config.h for details). */
 #define PSA_WANT_ECC_SECP_R1_256                1
 #define PSA_WANT_ECC_SECP_R1_384                1
 #define PSA_WANT_ECC_SECP_R1_521                1