diff --git a/AAXtoMP3 b/AAXtoMP3
index 150db65..690a796 100755
--- a/AAXtoMP3
+++ b/AAXtoMP3
@@ -526,7 +526,7 @@ save_metadata() {
         .content_metadata.chapter_info.chapters |
         to_entries |
         .[] |
-        "CHAPTER\((.key | pad(2)))=\(((.value.start_offset_ms / (1000*60*60)) %24 | floor | pad(2))):\(((.value.start_offset_ms / (1000*60)) %60 | floor | pad(2))):\(((.value.start_offset_ms / 1000) %60 | floor | pad(2))).\((.value.start_offset_ms % 1000 | pad(3)))
+        "CHAPTER\((.key))=\(((.value.start_offset_ms / (1000*60*60)) %24 | floor | pad(2))):\(((.value.start_offset_ms / (1000*60)) %60 | floor | pad(2))):\(((.value.start_offset_ms / 1000) %60 | floor | pad(2))).\((.value.start_offset_ms % 1000 | pad(3)))
 CHAPTER\((.key | pad(2)))NAME=\(.value.title)"' "${extra_chapter_file}" > "${tmp_chapter_file}"
     fi
   fi