diff --git a/gen/decoder.go b/gen/decoder.go
index 184b229..f7e415f 100644
--- a/gen/decoder.go
+++ b/gen/decoder.go
@@ -48,8 +48,8 @@ var primitiveStringDecoders = map[reflect.Kind]string{
 	reflect.Uint32:  "in.Uint32Str()",
 	reflect.Uint64:  "in.Uint64Str()",
 	reflect.Uintptr: "in.UintptrStr()",
-	reflect.Float32: "in.Float32()Str",
-	reflect.Float64: "in.Float64()Str",
+	reflect.Float32: "in.Float32Str()",
+	reflect.Float64: "in.Float64Str()",
 }
 
 var customDecoders = map[string]string{
diff --git a/tests/data.go b/tests/data.go
index 5f18a98..f6d6653 100644
--- a/tests/data.go
+++ b/tests/data.go
@@ -38,8 +38,11 @@ type PrimitiveTypes struct {
 	Uint32String uint32 `json:",string"`
 	Uint64String uint64 `json:",string"`
 
-	Float32 float32 `json:",string"`
-	Float64 float64 `json:",string"`
+	Float32 float32
+	Float64 float64
+
+	Float32String float32 `json:",string"`
+	Float64String float64 `json:",string"`
 
 	Ptr    *string
 	PtrNil *string
@@ -77,6 +80,9 @@ var primitiveTypesValue = PrimitiveTypes{
 	Float32: 1.5,
 	Float64: math.MaxFloat64,
 
+	Float32String: 1.5,
+	Float64String: math.MaxFloat64,
+
 	Ptr: &str,
 }
 
@@ -110,6 +116,9 @@ var primitiveTypesString = "{" +
 	`"Float32":` + fmt.Sprint(1.5) + `,` +
 	`"Float64":` + fmt.Sprint(math.MaxFloat64) + `,` +
 
+	`"Float32String":"` + fmt.Sprint(1.5) + `",` +
+	`"Float64String":"` + fmt.Sprint(math.MaxFloat64) + `",` +
+
 	`"Ptr":"bla",` +
 	`"PtrNil":null` +