diff --git a/Include/Protocol/OcLog.h b/Include/Protocol/OcLog.h
index 18627971..623b2033 100755
--- a/Include/Protocol/OcLog.h
+++ b/Include/Protocol/OcLog.h
@@ -15,8 +15,14 @@
 #ifndef OC_LOG_PROTOCOL_H
 #define OC_LOG_PROTOCOL_H
 
-// The defines for the log flags.
+///
+/// Current supported log protocol revision.
+///
+#define OC_LOG_REVISION  0x01000A
 
+///
+/// The defines for the log flags.
+///
 #define OC_LOG_DISABLE      0
 #define OC_LOG_ENABLE       BIT0
 #define OC_LOG_CONSOLE      BIT1
diff --git a/Library/OcDebugLogLib/OcDebugLogLib.c b/Library/OcDebugLogLib/OcDebugLogLib.c
index e8321dda..83f94987 100755
--- a/Library/OcDebugLogLib/OcDebugLogLib.c
+++ b/Library/OcDebugLogLib/OcDebugLogLib.c
@@ -65,7 +65,7 @@ DebugPrint (
       (VOID **) &mOcLog
       );
 
-    if (EFI_ERROR (Status)) {
+    if (EFI_ERROR (Status) || mOcLog->Revision != OC_LOG_REVISION) {
       mOcLog = NULL;
     }
   }
diff --git a/Library/OcDebugLogLib/OcLogInternal.h b/Library/OcDebugLogLib/OcLogInternal.h
index abf5d2d9..ab515d00 100755
--- a/Library/OcDebugLogLib/OcLogInternal.h
+++ b/Library/OcDebugLogLib/OcLogInternal.h
@@ -18,7 +18,6 @@
 #include <Protocol/OcLog.h>
 #include <Protocol/DataHub.h>
 
-#define OC_LOG_REVISION               0x01000A
 #define OC_LOG_BUFFER_SIZE            BASE_512KB
 #define OC_LOG_LINE_BUFFER_SIZE       BASE_1KB
 #define OC_LOG_FILE_PATH_BUFFER_SIZE  256