diff --git a/platform/jn516x/Makefile.jn516x b/platform/jn516x/Makefile.jn516x
index b3dce252a..50f0a393d 100644
--- a/platform/jn516x/Makefile.jn516x
+++ b/platform/jn516x/Makefile.jn516x
@@ -48,6 +48,12 @@ LDLIBS := $(subst MiniMac_JN516x, ,$(LDLIBS))
   LDLIBS += JPT_$(JENNIC_CHIP)
 endif
 
+# Enable all warnings
+CFLAGS += -Wall
+# Disable warnings that result many false positives with the Contiki core
+CFLAGS += -Wno-strict-aliasing
+CFLAGS += -Wno-cast-align
+
 # Warings as error
 ifdef WERROR
 CFLAGS += -Werror
@@ -69,9 +75,6 @@ SIZE:=$(CROSS_COMPILE)-size
 OBJCOPY:=$(CROSS_COMPILE)-objcopy
 OBJDUMP:=$(CROSS_COMPILE)-objdump
 
-CFLAGS  := $(subst -Wcast-align,,$(CFLAGS))
-CFLAGS  := $(subst -Wall,,$(CFLAGS))
-
 ARCH = ccm-star.c exceptions.c rtimer-arch.c slip_uart0.c clock.c micromac-radio.c \
        mtarch.c node-id.c watchdog.c log.c ringbufindex.c slip.c sprintf.c 
 # Default uart0 for printf and slip