diff --git a/README.md b/README.md
index e48e19c..d89fe51 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,7 @@ Or put a copy of `pdfsearch.py` in your working directory.
 >>> context_length = 2
 >>> results = search_pdf(pdf_name, search_patterns, context_length)
 
+>>> import pandas as pd
 >>> pd.DataFrame(results)
 
 document         page   pattern  word          context