diff --git a/hacktricks-preprocessor.py b/hacktricks-preprocessor.py
index 56a0cf0dc..37f549101 100644
--- a/hacktricks-preprocessor.py
+++ b/hacktricks-preprocessor.py
@@ -43,14 +43,14 @@ def ref(matchobj):
             if href.endswith("/"):
                 href = href+"README.md" # Fix if ref points to a folder
             chapter, _path = findtitle(href, book, "source_path")
-            logger.debug(f'Recursive title search result: {chapter['name']}')
+            logger.debug(f'Recursive title search result: {chapter["name"]}')
             title = chapter['name']
         except Exception as e:
             try:
                 dir = path.dirname(current_chapter['source_path'])
                 logger.debug(f'Error getting chapter title: {href} trying with relative path {path.normpath(path.join(dir,href))}')
                 chapter, _path = findtitle(path.normpath(path.join(dir,href)), book, "source_path")
-                logger.debug(f'Recursive title search result: {chapter['name']}')
+                logger.debug(f'Recursive title search result: {chapter["name"]}')
                 title = chapter['name']
             except Exception as e:
                 logger.debug(f'Error getting chapter title: {path.normpath(path.join(dir,href))}')