diff --git a/codearchiver-bot b/codearchiver-bot
index 24bfe9e..05db19a 100755
--- a/codearchiver-bot
+++ b/codearchiver-bot
@@ -142,9 +142,9 @@ function respond {
 
 			# Find nonexistent filename for log file (*not* concurrency-safe!)
 			logbasename="$(date +%Y%m%dT%H%M%SZ)_${singlejobid}"
-			if [[ -e "${logbasename}_codearchiver.log" ]]; then
+			if [[ -e "${logbasename}_codearchiver.log" || -e "${logbasename}_codearchiver.log.zst" ]]; then
 				for ((j=0; ; ++j)); do
-					if [[ ! -e "${logbasename}_coll${j}_codearchiver.log" ]]; then
+					if [[ ! -e "${logbasename}_coll${j}_codearchiver.log" || -e "${logbasename}_coll${j}_codearchiver.log.zst" ]]; then
 						break
 					fi
 				done