diff --git a/IMG/cpio/ventoy/init_chain b/IMG/cpio/ventoy/init_chain
index f9f71b7f..e0fb0e4c 100755
--- a/IMG/cpio/ventoy/init_chain
+++ b/IMG/cpio/ventoy/init_chain
@@ -73,8 +73,10 @@ ventoy_unpack_initramfs() {
     for vtx in '1F8B zcat' '1F9E zcat' '425A bzcat' '5D00 lzcat' 'FD37 xzcat' '894C lzopcat' '0221 lz4cat' '28B5 zstdcat' '3037 cat' '4C5A lunzip -c'; do
         if [ "${vtx:0:4}" = "${vtmagic:0:4}" ]; then
             echo "vtx=$vtx" >> $VTLOG
-            dd if=$vtfile skip=$vtskip of=$vttmp iflag=skip_bytes status=none
-            mv $vttmp $vtfile                  
+            if [ $vtskip -ne 0 ]; then
+                dd if=$vtfile skip=$vtskip of=$vttmp iflag=skip_bytes status=none
+                mv $vttmp $vtfile               
+            fi   
             if [ "${vtx:5}" = "xzcat" ]; then
                 rm -f $VTOY_PATH/xzlog
                 ${vtx:5} $vtfile 2> $VTOY_PATH/xzlog | (cpio -idmu 2>>$VTLOG; cat > $vttmp)