diff --git a/pageindex/page_index.py b/pageindex/page_index.py
index 882fb5dea..39018c4df 100644
--- a/pageindex/page_index.py
+++ b/pageindex/page_index.py
@@ -239,7 +239,7 @@ def transform_dots_to_colon(text):
 
 def toc_index_extractor(toc, content, model=None):
     print('start toc_index_extractor')
-    tob_extractor_prompt = """
+    toc_extractor_prompt = """
     You are given a table of contents in a json format and several pages of a document, your job is to add the physical_index to the table of contents in the json format.
 
     The provided pages contains tags like <physical_index_X> and <physical_index_X> to indicate the physical location of the page X.
@@ -260,7 +260,7 @@ def toc_index_extractor(toc, content, model=None):
     If the section is not in the provided pages, do not add the physical_index to it.
     Directly return the final JSON structure. Do not output anything else."""
 
-    prompt = tob_extractor_prompt + '\nTable of contents:\n' + str(toc) + '\nDocument pages:\n' + content
+    prompt = toc_extractor_prompt + '\nTable of contents:\n' + str(toc) + '\nDocument pages:\n' + content
     response = ChatGPT_API(model=model, prompt=prompt)
     json_content = extract_json(response)    
     return json_content
@@ -730,7 +730,7 @@ def check_toc(page_list, opt=None):
 
 ################### fix incorrect toc #########################################################
 def single_toc_item_index_fixer(section_title, content, model="gpt-4o-2024-11-20"):
-    tob_extractor_prompt = """
+    toc_extractor_prompt = """
     You are given a section title and several pages of a document, your job is to find the physical index of the start page of the section in the partial document.
 
     The provided pages contains tags like <physical_index_X> and <physical_index_X> to indicate the physical location of the page X.
@@ -742,7 +742,7 @@ def single_toc_item_index_fixer(section_title, content, model="gpt-4o-2024-11-20
     }
     Directly return the final JSON structure. Do not output anything else."""
 
-    prompt = tob_extractor_prompt + '\nSection Title:\n' + str(section_title) + '\nDocument pages:\n' + content
+    prompt = toc_extractor_prompt + '\nSection Title:\n' + str(section_title) + '\nDocument pages:\n' + content
     response = ChatGPT_API(model=model, prompt=prompt)
     json_content = extract_json(response)    
     return convert_physical_index_to_int(json_content['physical_index'])