diff --git a/examples/diff.py b/examples/diff.py
index 1dd9bbf4..fabcd621 100644
--- a/examples/diff.py
+++ b/examples/diff.py
@@ -1,19 +1,20 @@
 #!/usr/bin/python
 # This trivial script demonstrates how to extract the unified diff for a single
 # commit in a local repository.
 #
 # Example usage:
 #  python examples/diff.py
 
 from dulwich.repo import Repo
 from dulwich.patch import write_tree_diff
 import sys
 
 repo_path = "."
-commit_id = "a6602654997420bcfd0bee2a0563d9416afe34b4"
+commit_id = b"a6602654997420bcfd0bee2a0563d9416afe34b4"
 
 r = Repo(repo_path)
 
 commit = r[commit_id]
 parent_commit = r[commit.parents[0]]
-write_tree_diff(sys.stdout, r.object_store, parent_commit.tree, commit.tree)
+outstream = getattr(sys.stdout, 'buffer', sys.stdout)
+write_tree_diff(outstream, r.object_store, parent_commit.tree, commit.tree)
diff --git a/examples/latest_change.py b/examples/latest_change.py
index 0f876def..d0c5c4b9 100644
--- a/examples/latest_change.py
+++ b/examples/latest_change.py
@@ -1,21 +1,23 @@
 #!/usr/bin/python
 # Example printing the last author of a specified file
 
 import sys
 import time
 from dulwich.repo import Repo
 
 if len(sys.argv) < 2:
     print("usage: %s filename" % (sys.argv[0], ))
     sys.exit(1)
 
 r = Repo(".")
 
-w = r.get_walker(paths=[sys.argv[1]], max_entries=1)
+path = sys.argv[1].encode('utf-8')
+
+w = r.get_walker(paths=[path], max_entries=1)
 try:
     c = next(iter(w)).commit
 except StopIteration:
     print("No file %s anywhere in history." % sys.argv[1])
 else:
     print("%s was last changed by %s at %s (commit %s)" % (
         sys.argv[1], c.author, time.ctime(c.author_time), c.id))