diff --git a/tools/pdf2txt.py b/tools/pdf2txt.py
index d9a3ebb..cd40de1 100755
--- a/tools/pdf2txt.py
+++ b/tools/pdf2txt.py
@@ -9,6 +9,7 @@ import pdfminer.settings
 pdfminer.settings.STRICT = False
 import pdfminer.high_level
 import pdfminer.layout
+from pdfminer.image import ImageWriter
 
 
 def extract_text(files=[], outfile='-',