diff --git a/Shared/lib/python3.4/site-packages/PyPDF2/pdf.py b/Shared/lib/python3.4/site-packages/PyPDF2/pdf.py
index 7fa57a7..be8959f 100644
--- a/Shared/lib/python3.4/site-packages/PyPDF2/pdf.py
+++ b/Shared/lib/python3.4/site-packages/PyPDF2/pdf.py
@@ -1911,6 +1911,8 @@ class PdfFileReader(object):
             if stream.tell() < 2:
                 raise utils.PdfReadError("EOL marker not found")
             step = min(stream.tell()-2, 8*1024)
+            if step < 2:
+                raise utils.PdfReadError("EOL marker not found")
             stream.seek(-step, 1)
             x = stream.read(step)
             if b_('\n') in x or b_('\r') in x: