diff --git a/plex/bin/plex-health b/plex/bin/plex-health
index eaed72f..a2f546e 100755
--- a/plex/bin/plex-health
+++ b/plex/bin/plex-health
@@ -203,7 +203,9 @@ check_posters() {
   local sections
   sections="$(plex_get /library/sections)"
   local key title type code bad total
-  WORKDIR="$(mktemp -d)"
+  # Reuse the dir check_unmatched may already have made; overwriting WORKDIR
+  # here would orphan it, since cleanup only removes the last one.
+  [[ -n "$WORKDIR" ]] || WORKDIR="$(mktemp -d)"
   while IFS=$'\t' read -r key title type; do
     case "$type" in
       movie) code=1 ;;