diff --git a/mitmproxy/contentviews.py b/mitmproxy/contentviews.py
index 706fa5ede..331a706f4 100644
--- a/mitmproxy/contentviews.py
+++ b/mitmproxy/contentviews.py
@@ -172,7 +172,7 @@ class ViewHex(View):
     def _format(data):
         for offset, hexa, s in strutils.hexdump(data):
             yield [
-                ("offset", offset + b" "),
+                ("offset", offset + " "),
                 ("text", hexa + "   "),
                 ("text", s)
             ]
diff --git a/netlib/strutils.py b/netlib/strutils.py
index 9208f954c..a51df8868 100644
--- a/netlib/strutils.py
+++ b/netlib/strutils.py
@@ -146,7 +146,7 @@ def hexdump(s):
             A generator of (offset, hex, str) tuples
     """
     for i in range(0, len(s), 16):
-        offset = "{:0=10x}".format(i).encode()
+        offset = "{:0=10x}".format(i)
         part = s[i:i + 16]
         x = " ".join("{:0=2x}".format(i) for i in six.iterbytes(part))
         x = x.ljust(47)  # 16*2 + 15