diff --git a/cmd/htpacker/packer/packer.go b/cmd/htpacker/packer/packer.go
index 6dba182..a6b0a1b 100644
--- a/cmd/htpacker/packer/packer.go
+++ b/cmd/htpacker/packer/packer.go
@@ -64,6 +64,11 @@ func (ignoreProgress) Begin(_, _ string) {}
 func (ignoreProgress) End(_, _ string)   {}
 
 const (
+	// minCompressionFileSize is the minimum filesize we need before
+	// considering compression. Note this must be at least 2, to avoid
+	// known bugs in go-zopfli.
+	minCompressionFileSize = 128
+
 	// minCompressionSaving means we'll only use the compressed version of
 	// the file if it's at least this many bytes smaller than the original.
 	// Chosen somewhat arbitrarily; we have to add an HTTP header, and the
@@ -433,6 +438,10 @@ func (p *packer) Uncompressed(srcPath string, dir *packed.File) error {
 // Gzip will gzip input data to a temporary file, and then append that to the
 // output file.
 func (p *packer) Gzip(data []byte, dir *packed.File) error {
+	if len(data) < minCompressionFileSize {
+		return nil
+	}
+
 	// write via temporary file
 	tmpfile, err := ioutil.TempFile("", "")
 	if err != nil {
@@ -474,6 +483,9 @@ func (p *packer) Gzip(data []byte, dir *packed.File) error {
 // Brotli will compress input data to a temporary file, and then append that to
 // the output file.
 func (p *packer) Brotli(data []byte, dir *packed.File) error {
+	if len(data) < minCompressionFileSize {
+		return nil
+	}
 	// write via temporary file
 	tmpfile, err := ioutil.TempFile("", "")
 	if err != nil {