diff --git a/contrib/tools/thumbs.sh b/contrib/tools/thumbs.sh
index 119c988..1d2c89e 100755
--- a/contrib/tools/thumbs.sh
+++ b/contrib/tools/thumbs.sh
@@ -6,9 +6,9 @@
 if [ "$1" == "" ] ; then
     echo "usage: $0 webroot_dir"
 else
-    cd $1
+    cd $1/img
     echo "regenerate missing thumbs in $(pwd)"
-    find img/ \
+    find . \
          -type f \
          -regextype posix-extended \
          -iregex '.*\.(png|jpg|gif)$' \
@@ -17,7 +17,7 @@ else
          -exec mogrify \
          -define jpeg:size=500x500 \
          -thumbnail '250>x250>' \
-         -path 'thm/{}.jpg' \
+         -path '../thm/{}.jpg' \
          -strip \
          '{}' \;
 fi