diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/hardware.h b/bacnet-stack/ports/bdk-atxx4-mstp/hardware.h
index 7e59ced0..1c21e023 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/hardware.h
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/hardware.h
@@ -49,8 +49,12 @@
 /*#define SEEPROM_PAGE_SIZE 64 */
 /*#define SEEPROM_WORD_ADDRESS_16BIT 1 */
 /* SEEPROM is 24C16 */
+#ifndef SEEPROM_PAGE_SIZE
 #define SEEPROM_PAGE_SIZE 16
+#endif
+#ifndef SEEPROM_WORD_ADDRESS_16BIT
 #define SEEPROM_WORD_ADDRESS_16BIT 0
+#endif
 
 #define SEEPROM_I2C_ADDRESS 0xA0
 #define SEEPROM_I2C_CLOCK 400000L
diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/input.c b/bacnet-stack/ports/bdk-atxx4-mstp/input.c
index a795b65e..269adcd8 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/input.c
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/input.c
@@ -33,7 +33,9 @@ static uint8_t Address_Switch;
 static uint8_t Buttons;
 static struct itimer Debounce_Timer;
 
+#ifndef BDK_V1_HACK
 #define BDK_V1_HACK 0
+#endif
 
 #if BDK_V1_HACK
 /* version 1 BDK workaournd for floating inputs */