ifneq (,$(filter nanocoap_dtls,$(USEMODULE)))
  CONFIG_NANOCOAP_BLOCKSIZE_DEFAULT := $(or $(CONFIG_NANOCOAP_BLOCKSIZE_DEFAULT),2)
  DTLS_MAX_BUF ?= ((1 << ($(CONFIG_NANOCOAP_BLOCKSIZE_DEFAULT) + 3)) + 36)
endif