diff --git a/desktop_env/evaluators/metrics/docs.py b/desktop_env/evaluators/metrics/docs.py
index 58bc4e5..81b3dc0 100644
--- a/desktop_env/evaluators/metrics/docs.py
+++ b/desktop_env/evaluators/metrics/docs.py
@@ -64,6 +64,7 @@ def contains_page_break(docx_file, rules):
 
     namespaces = {'w': 'http://schemas.openxmlformats.org/wordprocessingml/2006/main'}
 
+    page_break_count = 0
     for paragraph in doc.paragraphs:
         for run in paragraph.runs:
             br_elems = run.element.findall('.//w:br', namespaces)