diff --git a/examples/6lbr-demo/Makefile b/examples/6lbr-demo/Makefile
index 45fcd72ad3..0339efbdf5 100644
--- a/examples/6lbr-demo/Makefile
+++ b/examples/6lbr-demo/Makefile
@@ -11,7 +11,7 @@ WITH_UDPCLIENT?=1
 WITH_WEBSERVER?=0
 WITH_COAPSERVER?=0
 WITH_TINYDTLS?=0
-WITH_DTLSECHO?=0
+WITH_DTLS_ECHO?=0
 WITH_DTLS_COAP?=0
 WITH_LLSEC?=0
 WITH_TCP?=0
@@ -129,7 +129,7 @@ CFLAGS += -DUIP_CONF_TCP=0
 PROJECTDIRS+=$(CONTIKI)/apps/tinydtls/aes $(CONTIKI)/apps/tinydtls/sha2 $(CONTIKI)/apps/tinydtls/ecc
 endif
 
-ifneq ($(WITH_DTLSECHO), 0)
+ifneq ($(WITH_DTLS_ECHO), 0)
 CFLAGS += -DWITH_DTLS_ECHO=1
 PROJECT_SOURCEFILES += dtls-echo.c
 endif
diff --git a/examples/6lbr/Makefile b/examples/6lbr/Makefile
index 88ba957a55..b5f58354d0 100644
--- a/examples/6lbr/Makefile
+++ b/examples/6lbr/Makefile
@@ -44,7 +44,7 @@ CFLAGS +=-DCETIC_6LBR_LEARN_RPL_MAC=$(CETIC_6LBR_LEARN_RPL_MAC)
 CONTIKI_WITH_RPL ?= 1
 WITH_IP64?=1
 WITH_TINYDTLS?=0
-WITH_DTLSECHO?=0
+WITH_DTLS_ECHO?=0
 WITH_DTLS_COAP?=0
 WITH_LLSEC?=1
 
@@ -99,7 +99,7 @@ CFLAGS += -DWITH_TINYDTLS=1
 PROJECTDIRS+=$(CONTIKI)/apps/tinydtls/aes $(CONTIKI)/apps/tinydtls/sha2 $(CONTIKI)/apps/tinydtls/ecc
 endif
 
-ifneq ($(WITH_DTLSECHO), 0)
+ifneq ($(WITH_DTLS_ECHO), 0)
 CFLAGS += -DWITH_DTLS_ECHO=1
 PROJECTDIRS += $(6LBR)/../6lbr-demo/apps/dtls-echo
 PROJECT_SOURCEFILES += dtls-echo.c