diff --git a/bacnet-stack/demo/handler/h_pt.c b/bacnet-stack/demo/handler/h_pt.c
index 625c0b44..5051104d 100644
--- a/bacnet-stack/demo/handler/h_pt.c
+++ b/bacnet-stack/demo/handler/h_pt.c
@@ -55,7 +55,7 @@ DATABLOCK MyData[MYMAXBLOCK];
 
 uint8_t IOBufferPT[MAX_APDU];   /* Buffer for building response in  */
 
-void ProcessPT(
+static void ProcessPT(
     BACNET_PRIVATE_TRANSFER_DATA * data)
 {
     int iLen;   /* Index to current location in data */
diff --git a/bacnet-stack/include/client.h b/bacnet-stack/include/client.h
index cc3e5a89..84887295 100644
--- a/bacnet-stack/include/client.h
+++ b/bacnet-stack/include/client.h
@@ -135,6 +135,15 @@ extern "C" {
         BACNET_APPLICATION_DATA_VALUE * object_value,
         uint8_t priority,
         int32_t array_index);
+    uint8_t Send_Write_Property_Request_Data(
+        uint32_t device_id,
+        BACNET_OBJECT_TYPE object_type,
+        uint32_t object_instance,
+        BACNET_PROPERTY_ID object_property,
+        uint8_t * application_data,
+        int application_data_len,
+        uint8_t priority,
+        int32_t array_index);
 
 /* returns the invoke ID for confirmed request, or 0 if failed */
     uint8_t Send_Reinitialize_Device_Request(
diff --git a/bacnet-stack/include/handlers.h b/bacnet-stack/include/handlers.h
index cafeea45..7d2437b1 100644
--- a/bacnet-stack/include/handlers.h
+++ b/bacnet-stack/include/handlers.h
@@ -200,6 +200,8 @@ extern "C" {
         BACNET_CONFIRMED_SERVICE_DATA * service_data);
     void handler_cov_task(
         uint32_t elapsed_seconds);
+    void handler_cov_init(
+        void);
     int handler_cov_encode_subscriptions(
         uint8_t * apdu,
         int max_apdu);
diff --git a/bacnet-stack/src/debug.c b/bacnet-stack/src/debug.c
index 17d7a94c..d60ea62f 100644
--- a/bacnet-stack/src/debug.c
+++ b/bacnet-stack/src/debug.c
@@ -41,6 +41,7 @@
 
 /** @file debug.c  Debug print function */
 
+#if DEBUG_ENABLED
 void debug_printf(
     const char *format,
     ...)
@@ -54,3 +55,4 @@ void debug_printf(
 
     return;
 }
+#endif