4 files changed, 70 insertions, 6 deletions
diff --git a/plumbing/object/file.go b/plumbing/object/file.go
index 35e7f24..4866777 100644
--- a/plumbing/object/file.go
+++ b/plumbing/object/file.go
@@ -81,7 +81,7 @@ func (iter *FileIter) Next() (*File, error) {
 			return nil, err
 		}
 
-		if entry.Mode.IsDir() {
+		if entry.Mode.IsDir() || entry.Mode == SubmoduleMode {
 			continue
 		}
 
diff --git a/plumbing/object/file_test.go b/plumbing/object/file_test.go
index 4c8bbb6..ff01c9f 100644
--- a/plumbing/object/file_test.go
+++ b/plumbing/object/file_test.go
@@ -247,3 +247,31 @@ func (s *FileSuite) TestFileIter(c *C) {
 
 	c.Assert(count, Equals, 1)
 }
+
+func (s *FileSuite) TestFileIterSubmodule(c *C) {
+	dotgit := fixtures.ByURL("https://github.com/git-fixtures/submodule.git").One().DotGit()
+	st, err := filesystem.NewStorage(dotgit)
+
+	c.Assert(err, IsNil)
+
+	hash := plumbing.NewHash("a692ec699bff9117c1ed91752afbb7d9d272ebef")
+	commit, err := GetCommit(st, hash)
+	c.Assert(err, IsNil)
+
+	tree, err := commit.Tree()
+	c.Assert(err, IsNil)
+
+	expected := []string{
+		".gitmodules",
+	}
+
+	var count int
+	i := tree.Files()
+	i.ForEach(func(f *File) error {
+		c.Assert(f.Name, Equals, expected[count])
+		count++
+		return nil
+	})
+
+	c.Assert(count, Equals, 1)
+}
diff --git a/plumbing/object/tree.go b/plumbing/object/tree.go
index 3bcd80a..27d8578 100644
--- a/plumbing/object/tree.go
+++ b/plumbing/object/tree.go
@@ -375,11 +375,6 @@ func (w *TreeWalker) Next() (name string, entry TreeEntry, err error) {
 			return
 		}
 
-		if entry.Mode == SubmoduleMode {
-			err = nil
-			continue
-		}
-
 		if entry.Mode.IsDir() {
 			obj, err = GetTree(w.s, entry.Hash)
 		}
diff --git a/plumbing/object/tree_test.go b/plumbing/object/tree_test.go
index be721b9..8ea31bb 100644
--- a/plumbing/object/tree_test.go
+++ b/plumbing/object/tree_test.go
@@ -4,7 +4,10 @@ import (
 	"io"
 	"os"
 
+	fixtures "github.com/src-d/go-git-fixtures"
+
 	"srcd.works/go-git.v4/plumbing"
+	"srcd.works/go-git.v4/storage/filesystem"
 
 	. "gopkg.in/check.v1"
 	"srcd.works/go-git.v4/plumbing/storer"
@@ -262,6 +265,44 @@ func (s *TreeSuite) TestTreeWalkerNextNonRecursive(c *C) {
 	c.Assert(count, Equals, 8)
 }
 
+func (s *TreeSuite) TestTreeWalkerNextSubmodule(c *C) {
+	dotgit := fixtures.ByURL("https://github.com/git-fixtures/submodule.git").One().DotGit()
+	st, err := filesystem.NewStorage(dotgit)
+	c.Assert(err, IsNil)
+
+	hash := plumbing.NewHash("a692ec699bff9117c1ed91752afbb7d9d272ebef")
+	commit, err := GetCommit(st, hash)
+	c.Assert(err, IsNil)
+
+	tree, err := commit.Tree()
+	c.Assert(err, IsNil)
+
+	expected := []string{
+		".gitmodules",
+		"basic",
+		"itself",
+	}
+
+	var count int
+	walker := NewTreeWalker(tree, true)
+	defer walker.Close()
+
+	for {
+		name, entry, err := walker.Next()
+		if err == io.EOF {
+			break
+		}
+
+		c.Assert(err, IsNil)
+		c.Assert(entry, NotNil)
+		c.Assert(name, Equals, expected[count])
+
+		count++
+	}
+
+	c.Assert(count, Equals, 3)
+}
+
 var treeWalkerExpects = []struct {
 	Path, Mode, Name, Hash, Tree string
 }{{