diff --git a/SourceLevelDebugPkg/Include/TransferProtocol.h b/SourceLevelDebugPkg/Include/TransferProtocol.h
index 45d82c2995..ef7c891c39 100644
--- a/SourceLevelDebugPkg/Include/TransferProtocol.h
+++ b/SourceLevelDebugPkg/Include/TransferProtocol.h
@@ -24,7 +24,7 @@
 //
 #define DEBUG_AGENT_REVISION_03         ((0 << 16) | 03)
 #define DEBUG_AGENT_REVISION_04         ((0 << 16) | 04)
-#define DEBUG_AGENT_REVISION            DEBUG_AGENT_REVISION_03
+#define DEBUG_AGENT_REVISION            DEBUG_AGENT_REVISION_04
 #define DEBUG_AGENT_CAPABILITIES        0
 
 //