diff --git a/bacnet-stack/include/bacdef.h b/bacnet-stack/include/bacdef.h
index 8d86c911..df49c8fb 100644
--- a/bacnet-stack/include/bacdef.h
+++ b/bacnet-stack/include/bacdef.h
@@ -41,10 +41,10 @@
 
 /* largest BACnet Instance Number */
 /* Also used as a device instance number wildcard address */
-#define BACNET_MAX_INSTANCE (0x3FFFFFU)
+#define BACNET_MAX_INSTANCE (0x3FFFFF)
 #define BACNET_INSTANCE_BITS 22
 /* large BACnet Object Type */
-#define BACNET_MAX_OBJECT (0x3FFU)
+#define BACNET_MAX_OBJECT (0x3FF)
 /* Array index 0=size of array, n=array element n,  MAX=all array elements */
 /* 32-bit MAX, to use with uint32_t */
 #define BACNET_ARRAY_ALL 0xFFFFFFFFU
@@ -53,7 +53,7 @@
 #define BACNET_MIN_PRIORITY 1
 #define BACNET_MAX_PRIORITY 16
 
-#define BACNET_BROADCAST_NETWORK (0xFFFFU)
+#define BACNET_BROADCAST_NETWORK (0xFFFF)
 /* Any size MAC address should be allowed which is less than or
    equal to 7 bytes.  The IPv6 addresses are planned to be handled
    outside this area. */