diff --git a/pygit2/__init__.py b/pygit2/__init__.py
index eed50c8..b4faa03 100644
--- a/pygit2/__init__.py
+++ b/pygit2/__init__.py
@@ -189,7 +189,7 @@ def clone_into(repo, remote, branch=None):
     and calling this function.
     """
 
-    err = C.git_clone_into(repo._repo, remote._remote, ffi.NULL, to_str(branch))
+    err = C.git_clone_into(repo._repo, remote._remote, ffi.NULL, to_str(branch), ffi.NULL)
 
     if remote._stored_exception:
         raise remote._stored_exception
diff --git a/pygit2/decl.h b/pygit2/decl.h
index 603509b..862f867 100644
--- a/pygit2/decl.h
+++ b/pygit2/decl.h
@@ -262,7 +262,8 @@ int git_clone_into(
 	git_repository *repo,
 	git_remote *remote,
 	const git_checkout_options *co_opts,
-	const char *branch);
+	const char *branch,
+	const git_signature *signature);
 
 /*
  * git_config