diff --git a/tools/dumppdf.py b/tools/dumppdf.py
index 8fefc06..76fae60 100755
--- a/tools/dumppdf.py
+++ b/tools/dumppdf.py
@@ -16,7 +16,7 @@
 from pdfminer.pdfpage import PDFPage
 from pdfminer.utils import isnumber
 
-ESC_PAT = re.compile(r'[\000-\037&<>()"\042\047\134\177-\377]')
+ESC_PAT = re.compile(r'[\000-\037&<>()"\047\134\177-\377]')
 
 
 def e(s):