diff --git a/arbitrum-fullnode.prune b/arbitrum-fullnode.prune
index 41fa74ae..9792f099 100644
--- a/arbitrum-fullnode.prune
+++ b/arbitrum-fullnode.prune
@@ -8,7 +8,7 @@ echo "running in $BASEPATH"
 #IFS=':' read -ra parts <<< $COMPOSE_FILE
 
 # Add the --init.prune option to the command list
-sed -i '/command:/a \ \     - --init.prune' "$BASEPATH/arbitrum-fullnode.yml"
+sed -i '/command:/a \ \     - --init.prune=full' "$BASEPATH/arbitrum-fullnode.yml"
 
 echo "$(cat $BASEPATH/arbitrum-fullnode.yml)"