diff --git a/generator.go b/generator.go
index 5782693..9ce2c31 100644
--- a/generator.go
+++ b/generator.go
@@ -32,6 +32,7 @@ func Generate(input http.FileSystem, opt Options) error {
 	}
 
 	var toc toc
+	toc.AllTypes = opt.ForceAllTypes
 	err = findAndWriteFiles(buf, input, &toc)
 	if err != nil {
 		return err
@@ -56,6 +57,7 @@ func Generate(input http.FileSystem, opt Options) error {
 type toc struct {
 	dirs []*dirInfo
 
+	AllTypes          bool // Force include all types
 	HasCompressedFile bool // There's at least one compressedFile.
 	HasFile           bool // There's at least one uncompressed file.
 }
@@ -291,7 +293,7 @@ func (fs vfsgen۰FS) Open(path string) (http.File, error) {
 		return nil, &os.PathError{Op: "open", Path: path, Err: os.ErrNotExist}
 	}
 
-	switch f := f.(type) {{"{"}}{{if .HasCompressedFile}}
+	switch f := f.(type) {{"{"}}{{if or .AllTypes .HasCompressedFile}}
 	case *vfsgen۰CompressedFileInfo:
 		gr, err := gzip.NewReader(bytes.NewReader(f.compressedContent))
 		if err != nil {
@@ -301,7 +303,7 @@ func (fs vfsgen۰FS) Open(path string) (http.File, error) {
 		return &vfsgen۰CompressedFile{
 			vfsgen۰CompressedFileInfo: f,
 			gr:                        gr,
-		}, nil{{end}}{{if .HasFile}}
+		}, nil{{end}}{{if or .AllTypes .HasFile}}
 	case *vfsgen۰FileInfo:
 		return &vfsgen۰File{
 			vfsgen۰FileInfo: f,
@@ -316,7 +318,7 @@ func (fs vfsgen۰FS) Open(path string) (http.File, error) {
 		panic(fmt.Sprintf("unexpected type %T", f))
 	}
 }
-{{if .HasCompressedFile}}
+{{if or .AllTypes .HasCompressedFile}}
 // vfsgen۰CompressedFileInfo is a static definition of a gzip compressed file.
 type vfsgen۰CompressedFileInfo struct {
 	name              string
@@ -391,7 +393,7 @@ func (f *vfsgen۰CompressedFile) Close() error {
 // We already imported "compress/gzip" and "io/ioutil", but ended up not using them. Avoid unused import error.
 var _ = gzip.Reader{}
 var _ = ioutil.Discard
-{{end}}{{if .HasFile}}
+{{end}}{{if or .AllTypes .HasFile}}
 // vfsgen۰FileInfo is a static definition of an uncompressed file (because it's not worth gzip compressing).
 type vfsgen۰FileInfo struct {
 	name    string
@@ -422,7 +424,7 @@ type vfsgen۰File struct {
 func (f *vfsgen۰File) Close() error {
 	return nil
 }
-{{else if not .HasCompressedFile}}
+{{else if and (not .AllTypes) (not .HasCompressedFile)}}
 // We already imported "bytes", but ended up not using it. Avoid unused import error.
 var _ = bytes.Reader{}
 {{end}}
diff --git a/generator_test.go b/generator_test.go
index ec7b9d2..48c6228 100644
--- a/generator_test.go
+++ b/generator_test.go
@@ -49,12 +49,19 @@ func TestGenerate_buildAndGofmt(t *testing.T) {
 		filename  string
 		fs        http.FileSystem
 		wantError func(error) bool // Nil function means want nil error.
+		force     bool
 	}{
 		{
 			// Empty.
 			filename: "empty.go",
 			fs:       union.New(nil),
 		},
+		{
+			// Force all types.
+			filename: "forceall.go",
+			fs:       union.New(nil),
+			force:    true,
+		},
 		{
 			// Test that vfsgen.Generate returns an error when there is
 			// an error reading from the input filesystem.
@@ -90,8 +97,9 @@ func TestGenerate_buildAndGofmt(t *testing.T) {
 		filename := filepath.Join(tempDir, test.filename)
 
 		err := vfsgen.Generate(test.fs, vfsgen.Options{
-			Filename:    filename,
-			PackageName: "test",
+			Filename:      filename,
+			PackageName:   "test",
+			ForceAllTypes: test.force,
 		})
 		switch {
 		case test.wantError == nil && err != nil:
diff --git a/options.go b/options.go
index d10d348..7ad2531 100644
--- a/options.go
+++ b/options.go
@@ -26,6 +26,9 @@ type Options struct {
 	// VariableComment is the comment of the http.FileSystem variable in the generated code.
 	// If left empty, it defaults to "{{.VariableName}} statically implements the virtual filesystem provided to vfsgen.".
 	VariableComment string
+
+	// ForceAllTypes forces the generator to generate all vfsgen types.
+	ForceAllTypes bool
 }
 
 // fillMissing sets default values for mandatory options that are left empty.