diff --git a/bacnet-stack/demo/object/device.h b/bacnet-stack/demo/object/device.h
index de443820..77dbaab7 100644
--- a/bacnet-stack/demo/object/device.h
+++ b/bacnet-stack/demo/object/device.h
@@ -235,7 +235,10 @@ extern "C" {
 
     void Device_getCurrentDateTime(
         BACNET_DATE_TIME * DateTime);
+
     int32_t Device_UTC_Offset(void);
+    void Device_UTC_Offset_Set(int16_t offset);
+
     bool Device_Daylight_Savings_Status(void);
     bool Device_Align_Intervals(void);
     bool Device_Align_Intervals_Set(bool flag);
diff --git a/bacnet-stack/demo/object/schedule.h b/bacnet-stack/demo/object/schedule.h
index 565b6f93..3cb12d6a 100644
--- a/bacnet-stack/demo/object/schedule.h
+++ b/bacnet-stack/demo/object/schedule.h
@@ -81,6 +81,13 @@ extern "C" {
     unsigned Schedule_Instance_To_Index(uint32_t instance);
     void Schedule_Init(void);
 
+    void Schedule_Out_Of_Service_Set(
+        uint32_t object_instance,
+        bool value);
+    bool Schedule_Out_Of_Service(
+        uint32_t object_instance);
+
+
     bool Schedule_Object_Name(uint32_t object_instance,
         BACNET_CHARACTER_STRING * object_name);
 
diff --git a/bacnet-stack/demo/object/trendlog.c b/bacnet-stack/demo/object/trendlog.c
index 3826aa62..8b7fc1d3 100644
--- a/bacnet-stack/demo/object/trendlog.c
+++ b/bacnet-stack/demo/object/trendlog.c
@@ -1594,7 +1594,7 @@ static int local_read_property(
  * Attempt to fetch the logged property and store it in the Trend Log       *
  ****************************************************************************/
 
-void TL_fetch_property(
+static void TL_fetch_property(
     int iLog)
 {
     uint8_t ValueBuf[MAX_APDU]; /* This is a big buffer in case someone selects the device object list for example */
diff --git a/bacnet-stack/ports/linux/bip-init.c b/bacnet-stack/ports/linux/bip-init.c
index 3048ccba..193d2451 100644
--- a/bacnet-stack/ports/linux/bip-init.c
+++ b/bacnet-stack/ports/linux/bip-init.c
@@ -78,6 +78,12 @@ static int get_local_ifr_ioctl(
     return rv;
 }
 
+/* forward prototype required for compilers */
+int get_local_address_ioctl(
+    char *ifname,
+    struct in_addr *addr,
+    int request);
+
 int get_local_address_ioctl(
     char *ifname,
     struct in_addr *addr,