diff --git a/scripts/tidy_filenames.sh b/scripts/tidy_filenames.sh
index 06fb6ce..9be37fb 100755
--- a/scripts/tidy_filenames.sh
+++ b/scripts/tidy_filenames.sh
@@ -3,8 +3,8 @@
 # Convert hypens in file names to underscores
 
 main() {
-    find . -depth -name '*-*' -name '*.md' | while read fname; do
-        new_fname=$(echo "$fname" | tr " _"  "_")
+    find . -depth -name '*.md' | while read fname; do
+		new_fname=$(echo "$fname" | tr " -"  "_")
         if [ -e "$new_fname" ]; then
             echo "File $new_fname already exists. Not replacing $fname"
         else