diff --git a/Makefile.libcoap b/Makefile.libcoap
index bd51e8c1..122e0faa 100644
--- a/Makefile.libcoap
+++ b/Makefile.libcoap
@@ -4,4 +4,4 @@ libcoap_dir := $(filter %libcoap,$(APPDS))
 vpath %c $(libcoap_dir)/src
 
 # set include path for coap sources
-CFLAGS += -I$(libcoap_dir)/include/coap
+CFLAGS += -I$(libcoap_dir)/include/coap -DCOAP_RESOURCES_NOHASH
diff --git a/examples/contiki/Makefile.common b/examples/contiki/Makefile.common
index 1ab8e716..e8d3fa24 100644
--- a/examples/contiki/Makefile.common
+++ b/examples/contiki/Makefile.common
@@ -4,7 +4,7 @@ top_srcdir ?= ../..
 
 CFLAGS += -std=gnu99
 
-CFLAGS += -I$(top_srcdir)/include/coap
+CFLAGS += -I$(top_srcdir)/include/coap -DCOAP_RESOURCES_NOHASH
 
 vpath %.c $(top_srcdir)/src