diff --git a/jwriter/writer.go b/jwriter/writer.go
index 2c5b2010..e433d086 100644
--- a/jwriter/writer.go
+++ b/jwriter/writer.go
@@ -237,25 +237,25 @@ func (w *Writer) Int64Str(n int64) {
 
 func (w *Writer) Float32(n float32) {
 	w.Buffer.EnsureSpace(20)
-	w.Buffer.Buf = strconv.AppendFloat(w.Buffer.Buf, float64(n), 'g', -1, 32)
+	w.Buffer.Buf = strconv.AppendFloat(w.Buffer.Buf, float64(n), 'f', -1, 32)
 }
 
 func (w *Writer) Float32Str(n float32) {
 	w.Buffer.EnsureSpace(20)
 	w.Buffer.Buf = append(w.Buffer.Buf, '"')
-	w.Buffer.Buf = strconv.AppendFloat(w.Buffer.Buf, float64(n), 'g', -1, 32)
+	w.Buffer.Buf = strconv.AppendFloat(w.Buffer.Buf, float64(n), 'f', -1, 32)
 	w.Buffer.Buf = append(w.Buffer.Buf, '"')
 }
 
 func (w *Writer) Float64(n float64) {
 	w.Buffer.EnsureSpace(20)
-	w.Buffer.Buf = strconv.AppendFloat(w.Buffer.Buf, n, 'g', -1, 64)
+	w.Buffer.Buf = strconv.AppendFloat(w.Buffer.Buf, n, 'f', -1, 64)
 }
 
 func (w *Writer) Float64Str(n float64) {
 	w.Buffer.EnsureSpace(20)
 	w.Buffer.Buf = append(w.Buffer.Buf, '"')
-	w.Buffer.Buf = strconv.AppendFloat(w.Buffer.Buf, float64(n), 'g', -1, 64)
+	w.Buffer.Buf = strconv.AppendFloat(w.Buffer.Buf, float64(n), 'f', -1, 64)
 	w.Buffer.Buf = append(w.Buffer.Buf, '"')
 }