diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index 4111b37..e2e45ac 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -619,7 +619,7 @@
 #error "MBEDTLS_SSL_PROTO_TLS1_2 defined, but not all prerequisites"
 #endif
 
-#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL) && ( !defined(MBEDTLS_HKDF_C) \
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL) && ( !defined(MBEDTLS_HKDF_C) && \
     !defined(MBEDTLS_SHA256_C) && !defined(MBEDTLS_SHA512_C) )
 #error "MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL defined, but not all prerequisites"
 #endif