diff --git a/Makefile b/Makefile
index 64c5aa3..9a1c4b6 100755
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
 EXTRA_CFLAGS += $(USER_EXTRA_CFLAGS)
 EXTRA_CFLAGS += -O2
 #EXTRA_CFLAGS += -O3
-#EXTRA_CFLAGS += -Wall
-#EXTRA_CFLAGS += -Wextra
+EXTRA_CFLAGS += -Wall
+EXTRA_CFLAGS += -Wextra
 #EXTRA_CFLAGS += -Werror
 #EXTRA_CFLAGS += -pedantic
 #EXTRA_CFLAGS += -Wshadow -Wpointer-arith -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
@@ -22,6 +22,11 @@ ifeq ($(GCC_VER_49),1)
 EXTRA_CFLAGS += -Wno-date-time	# Fix compile error && warning on gcc 4.9 and later
 endif
 
+# Relax some warnings from '-Wextra' so we won't get flooded with warnings
+EXTRA_CFLAGS += -Wno-sign-compare
+EXTRA_CFLAGS += -Wno-missing-field-initializers
+EXTRA_CFLAGS += -Wno-type-limits
+
 EXTRA_CFLAGS += -I$(src)/include
 EXTRA_CFLAGS += -I$(src)/hal/phydm