diff --git a/programs/expand/expand.c b/programs/expand/expand.c
index 2bede0854ec..ea7bfdf80be 100644
--- a/programs/expand/expand.c
+++ b/programs/expand/expand.c
@@ -30,7 +30,7 @@ static int myprintf(const char* format, ...)
 {
     va_list     va;
     char        tmp[8192];
-    DWORD       w;
+    DWORD       w = 0;
     int         len;
 
     va_start(va, format);