diff --git a/data.go b/data.go
index 6cfda2a..36aaa61 100644
--- a/data.go
+++ b/data.go
@@ -80,7 +80,9 @@ func (o Options) String() string {
 	if o.FlipHorizontal {
 		fmt.Fprintf(buf, ",%s", optFlipHorizontal)
 	}
-	fmt.Fprintf(buf, ",%s%d", string(optQualityPrefix), o.Quality)
+	if o.Quality != 0 {
+		fmt.Fprintf(buf, ",%s%d", string(optQualityPrefix), o.Quality)
+	}
 	return buf.String()
 }
 
diff --git a/data_test.go b/data_test.go
index 4e4f616..63513b8 100644
--- a/data_test.go
+++ b/data_test.go
@@ -26,7 +26,7 @@ func TestOptions_String(t *testing.T) {
 	}{
 		{
 			emptyOptions,
-			"0x0,q0",
+			"0x0",
 		},
 		{
 			Options{1, 2, true, 90, true, true, 80},