diff --git a/src/PIL/TiffImagePlugin.py b/src/PIL/TiffImagePlugin.py
index fb394af1649..bb86c53aa09 100644
--- a/src/PIL/TiffImagePlugin.py
+++ b/src/PIL/TiffImagePlugin.py
@@ -1175,6 +1175,7 @@ def _load_libtiff(self):
             # we have something else.
             if DEBUG:
                 print("don't have fileno or getvalue. just reading")
+            self.fp.seek(0)
             # UNDONE -- so much for that buffer size thing.
             n, err = decoder.decode(self.fp.read())