diff --git a/Makefile b/Makefile
index 7df9a6a..5c6a475 100755
--- a/Makefile
+++ b/Makefile
@@ -15,11 +15,6 @@ EXTRA_CFLAGS += -Wno-unused-function
 EXTRA_CFLAGS += -Wno-unused
 EXTRA_CFLAGS += -Wno-uninitialized
 
-GCC_VER_49 := $(shell echo `$(CC) -dumpversion | cut -f1-2 -d.` \>= 4.9 | bc )
-ifeq ($(GCC_VER_49),1)
-EXTRA_CFLAGS += -Wno-date-time	# Fix compile error && warning on gcc 4.9 and later
-endif
-
 EXTRA_CFLAGS += -I$(src)/include
 EXTRA_CFLAGS += -I$(src)/hal/phydm