diff --git a/EdkCompatibilityPkg/Sample/Platform/Generic/RuntimeDxe/StatusCode/Lib/RtLedStatusCode/RtLedStatusCode.c b/EdkCompatibilityPkg/Sample/Platform/Generic/RuntimeDxe/StatusCode/Lib/RtLedStatusCode/RtLedStatusCode.c
index a92e2817e1..adf30b80cf 100644
--- a/EdkCompatibilityPkg/Sample/Platform/Generic/RuntimeDxe/StatusCode/Lib/RtLedStatusCode/RtLedStatusCode.c
+++ b/EdkCompatibilityPkg/Sample/Platform/Generic/RuntimeDxe/StatusCode/Lib/RtLedStatusCode/RtLedStatusCode.c
@@ -203,7 +203,7 @@ CodeTypeToProgressCode (
   //
   if (((CodeType & EFI_STATUS_CODE_TYPE_MASK) == EFI_PROGRESS_CODE)) {
     *PostCode = (UINT8) (((Value & EFI_STATUS_CODE_CLASS_MASK) >> 24) << 5);
-    *PostCode |= (UINT8) (((Value & EFI_STATUS_CODE_SUBCLASS_MASK) >> 16) & 0x1f);
+    *PostCode = (UINT8) (*PostCode | (UINT8) (((Value & EFI_STATUS_CODE_SUBCLASS_MASK) >> 16) & 0x1f));
     return TRUE;
   }