diff --git a/clone b/clone
index 9a95b89..d84df84 100644
--- a/clone
+++ b/clone
@@ -1,7 +1,7 @@
 sh tiny
 HOST=l_samenv@samenv
 DIR=boxes/images
-IMGDAT=apumaster_$(date +'%Y-%m-%d')
+IMGDAT=apumaster_$(date +'%Y-%m-%d').lz4
 read -p "image name to write to $HOST:$DIR [$IMGDAT]: " IMG
 if [ -z "$IMG" ]; then
    IMG=$IMGDAT