diff --git a/fsw/src/sample_app.c b/fsw/src/sample_app.c
index 82e51e1..cd79837 100644
--- a/fsw/src/sample_app.c
+++ b/fsw/src/sample_app.c
@@ -174,7 +174,7 @@ int32 SAMPLE_AppInit( void )
     ** Initialize housekeeping packet (clear user data area).
     */
     CFE_SB_InitMsg(&SAMPLE_AppData.HkBuf.MsgHdr,
-                   SAMPLE_APP_HK_TLM_MID,
+                   CFE_SB_ValueToMsgId(SAMPLE_APP_HK_TLM_MID),
                    sizeof(SAMPLE_AppData.HkBuf),
                    true);
 
@@ -194,7 +194,7 @@ int32 SAMPLE_AppInit( void )
     /*
     ** Subscribe to Housekeeping request commands
     */
-    status = CFE_SB_Subscribe(SAMPLE_APP_SEND_HK_MID,
+    status = CFE_SB_Subscribe(CFE_SB_ValueToMsgId(SAMPLE_APP_SEND_HK_MID),
                               SAMPLE_AppData.CommandPipe);
     if (status != CFE_SUCCESS)
     {
@@ -206,7 +206,7 @@ int32 SAMPLE_AppInit( void )
     /*
     ** Subscribe to ground command packets
     */
-    status = CFE_SB_Subscribe(SAMPLE_APP_CMD_MID,
+    status = CFE_SB_Subscribe(CFE_SB_ValueToMsgId(SAMPLE_APP_CMD_MID),
                               SAMPLE_AppData.CommandPipe);
     if (status != CFE_SUCCESS )
     {
@@ -264,7 +264,7 @@ void SAMPLE_ProcessCommandPacket( CFE_SB_MsgPtr_t Msg )
 
     MsgId = CFE_SB_GetMsgId(Msg);
 
-    switch (MsgId)
+    switch (CFE_SB_MsgIdToValue(MsgId))
     {
         case SAMPLE_APP_CMD_MID:
             SAMPLE_ProcessGroundCommand(Msg);
@@ -278,7 +278,7 @@ void SAMPLE_ProcessCommandPacket( CFE_SB_MsgPtr_t Msg )
             CFE_EVS_SendEvent(SAMPLE_INVALID_MSGID_ERR_EID,
                               CFE_EVS_EventType_ERROR,
          	              "SAMPLE: invalid command packet,MID = 0x%x",
-                              MsgId);
+         	             (unsigned int)CFE_SB_MsgIdToValue(MsgId));
             break;
     }
 
@@ -488,7 +488,7 @@ bool SAMPLE_VerifyCmdLength( CFE_SB_MsgPtr_t Msg, uint16 ExpectedLength )
         CFE_EVS_SendEvent(SAMPLE_LEN_ERR_EID,
                           CFE_EVS_EventType_ERROR,
                           "Invalid Msg length: ID = 0x%X,  CC = %d, Len = %d, Expected = %d",
-                          MessageID,
+                          (unsigned int)CFE_SB_MsgIdToValue(MessageID),
                           CommandCode,
                           ActualLength,
                           ExpectedLength);
diff --git a/unit-test/coveragetest/coveragetest_sample_app.c b/unit-test/coveragetest/coveragetest_sample_app.c
index b7a53a6..25d0a87 100644
--- a/unit-test/coveragetest/coveragetest_sample_app.c
+++ b/unit-test/coveragetest/coveragetest_sample_app.c
@@ -264,18 +264,18 @@ void Test_SAMPLE_ProcessCommandPacket(void)
      * The CFE_SB_GetMsgId() stub uses a data buffer to hold the
      * message ID values to return.
      */
-    TestMsgId = SAMPLE_APP_CMD_MID;
+    TestMsgId = CFE_SB_ValueToMsgId(SAMPLE_APP_CMD_MID);
     UT_SetDataBuffer(UT_KEY(CFE_SB_GetMsgId), &TestMsgId,
             sizeof(TestMsgId), false);
     SAMPLE_ProcessCommandPacket(&TestMsg.Base);
 
-    TestMsgId = SAMPLE_APP_SEND_HK_MID;
+    TestMsgId = CFE_SB_ValueToMsgId(SAMPLE_APP_SEND_HK_MID);
     UT_SetDataBuffer(UT_KEY(CFE_SB_GetMsgId), &TestMsgId,
             sizeof(TestMsgId), false);
     SAMPLE_ProcessCommandPacket(&TestMsg.Base);
 
     /* invalid message id */
-    TestMsgId = 0;
+    TestMsgId = CFE_SB_INVALID_MSG_ID;
     UT_SetDataBuffer(UT_KEY(CFE_SB_GetMsgId), &TestMsgId,
             sizeof(TestMsgId), false);
     SAMPLE_ProcessCommandPacket(&TestMsg.Base);