diff --git a/BaseTools/Source/C/LzmaCompress/Sdk/C/7zFile.c b/BaseTools/Source/C/LzmaCompress/Sdk/C/7zFile.c
index 98fe7164f5..b2fed368a4 100644
--- a/BaseTools/Source/C/LzmaCompress/Sdk/C/7zFile.c
+++ b/BaseTools/Source/C/LzmaCompress/Sdk/C/7zFile.c
@@ -213,7 +213,7 @@ WRes File_GetLength(CSzFile *p, UInt64 *length)
 {
   #ifdef USE_WINDOWS_FILE
   
-  DWORD sizeHigh;
+  DWORD sizeHigh = 0;
   DWORD sizeLow = GetFileSize(p->handle, &sizeHigh);
   if (sizeLow == 0xFFFFFFFF)
   {