diff --git a/default b/default
index 4199e55..3121282 100644
--- a/default
+++ b/default
@@ -21,3 +21,4 @@ URL_978="http://127.0.0.1/skyaware978"
 CHUNK_SIZE=60
 INT_978=1
 PF_URL="http://127.0.0.1:30053/ajax/aircraft"
+COMPRESS_978=""
diff --git a/tar1090.service b/tar1090.service
index a61c4e0..f138aa7 100644
--- a/tar1090.service
+++ b/tar1090.service
@@ -11,7 +11,7 @@ RuntimeDirectory=INSTANCE
 RuntimeDirectoryMode=0755
 EnvironmentFile=/usr/local/share/tar1090/default
 EnvironmentFile=/etc/default/INSTANCE
-ExecStart=-/usr/local/share/tar1090/tar1090.sh /run/INSTANCE SOURCE_DIR $INTERVAL $HISTORY_SIZE $CHUNK_SIZE $ENABLE_978 $URL_978 $INT_978 $PF_URL
+ExecStart=-/usr/local/share/tar1090/tar1090.sh /run/INSTANCE SOURCE_DIR $INTERVAL $HISTORY_SIZE $CHUNK_SIZE $ENABLE_978 $URL_978 $INT_978 $PF_URL $COMPRESS_978
 Type=simple
 Restart=always
 RestartSec=30
diff --git a/tar1090.sh b/tar1090.sh
index 77b2b96..75ffd64 100755
--- a/tar1090.sh
+++ b/tar1090.sh
@@ -14,6 +14,7 @@ ENABLE_978=$6
 URL_978=$7
 INT_978=$8
 PF_URL=$9
+COMPRESS_978=${10}
 
 if ! [[ -d $RUN_DIR && -d $SRC_DIR ]]
 then