diff --git a/tools/run-mypy b/tools/run-mypy
index 8debe0f7b6..bbd13030bd 100755
--- a/tools/run-mypy
+++ b/tools/run-mypy
@@ -43,7 +43,6 @@ exclude_py3 = """
 zerver/lib/actions.py
 zerver/lib/bugdown/__init__.py
 zerver/lib/bugdown/codehilite.py
-zerver/lib/camo.py
 zerver/lib/ccache.py
 zerver/lib/debug.py
 zerver/lib/email_mirror.py
diff --git a/zerver/lib/camo.py b/zerver/lib/camo.py
index 4d38c57284..4c2a6d4273 100644
--- a/zerver/lib/camo.py
+++ b/zerver/lib/camo.py
@@ -15,5 +15,5 @@ def get_camo_url(url):
     encoded_url = url.encode("utf-8")
     encoded_camo_key = settings.CAMO_KEY.encode("utf-8")
     digest = hmac.new(encoded_camo_key, encoded_url, hashlib.sha1).hexdigest()
-    hex_encoded_url = codecs.encode(encoded_url, "hex")
+    hex_encoded_url = codecs.encode(encoded_url, "hex") # type: ignore # https://github.com/python/typeshed/issues/300
     return "%s%s/%s" % (settings.CAMO_URI, digest, hex_encoded_url.decode("utf-8"))