#remove one of the following defines and comment out the relevant line
 #in the next section to remove that particular feature from compilation
-APP_CFLAGS     = -DWITH_ISO14443a_StandAlone -DWITH_LF -DWITH_ISO15693 -DWITH_ISO14443a -DWITH_ISO14443b -DWITH_ICLASS -DWITH_LEGICRF -DWITH_HITAG  -DWITH_CRC -DON_DEVICE \
+APP_CFLAGS     = -DWITH_ISO14443a_StandAlone -DWITH_LF -DWITH_ISO15693 -DWITH_ISO14443a -DWITH_ISO14443b -DWITH_ICLASS -DWITH_LEGICRF -DWITH_HITAG  -DWITH_CRC -DON_DEVICE -DWITH_HFSNOOP \
                                -fno-strict-aliasing -ffunction-sections -fdata-sections
 #-DWITH_LCD
 
        legic_prng.c \
        iclass.c \
        BigBuf.c \
-       optimized_cipher.c
+       optimized_cipher.c \
+       hfsnoop.c
 
 # Do not move this inclusion before the definition of {THUMB,ASM,ARM}SRC
 include ../common/Makefile.common