diff --git a/ports/espressif/esp-idf-config/sdkconfig.defaults b/ports/espressif/esp-idf-config/sdkconfig.defaults
index 7f665c7575a99..3f7d9d371cf66 100644
--- a/ports/espressif/esp-idf-config/sdkconfig.defaults
+++ b/ports/espressif/esp-idf-config/sdkconfig.defaults
@@ -67,7 +67,6 @@ CONFIG_MBEDTLS_SSL_OUT_CONTENT_LEN=2048
 #
 # mbedTLS v3.x related
 #
-CONFIG_MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH=y
 # CONFIG_MBEDTLS_SSL_KEEP_PEER_CERTIFICATE is not set
 # end of mbedTLS v3.x related