diff --git a/fsw/src/sample_app_msg.h b/fsw/src/sample_app_msg.h
index 92431d0..6ae76db 100644
--- a/fsw/src/sample_app_msg.h
+++ b/fsw/src/sample_app_msg.h
@@ -75,7 +75,8 @@ typedef struct
 {
     CFE_SB_TlmHdr_t            TlmHeader;
     SAMPLE_APP_HkTlm_Payload_t Payload;
-} OS_PACK SAMPLE_APP_HkTlm_t;
+} SAMPLE_APP_HkTlm_t;
+
 
 #endif /* _sample_app_msg_h_ */