diff --git a/libuuu/fastboot.h b/libuuu/fastboot.h
index ba37349e..ca7d4bb3 100644
--- a/libuuu/fastboot.h
+++ b/libuuu/fastboot.h
@@ -150,6 +150,6 @@ class FBCopy : public CmdBase
 	bool m_bDownload;
 	size_t m_Maxsize_pre_cmd;
 	int parser(char *p=NULL);
-	FBCopy(char *p) :CmdBase(p) { m_Maxsize_pre_cmd = 0x10000; };
+	FBCopy(char *p) :CmdBase(p) { m_Maxsize_pre_cmd = 0x1000; };
 	int run(CmdCtx *ctx);
 };