diff --git a/json.go b/json.go
index 3741560a..5b2ef045 100644
--- a/json.go
+++ b/json.go
@@ -254,7 +254,7 @@ func addFileJSONLookup() {
 // encoding/json.RawMessage is a special case of []byte
 // it cannot be handled as a reflect.Array/reflect.Slice
 // because it needs additional structure in the output
-func rJsonRawMessage(f *Faker, t reflect.Type, v reflect.Value, tag string, size int) error {
+func rJsonRawMessage(f *Faker, v reflect.Value) error {
 	b, err := f.JSON(nil)
 	if err != nil {
 		return err
@@ -268,7 +268,7 @@ func rJsonRawMessage(f *Faker, t reflect.Type, v reflect.Value, tag string, size
 // that represents a JSON number literal.
 // It cannot be handled as a string because it needs to
 // represent an integer or a floating-point number.
-func rJsonNumber(f *Faker, t reflect.Type, v reflect.Value, tag string, size int) error {
+func rJsonNumber(f *Faker, v reflect.Value, tag string) error {
 	var ret json.Number
 
 	var numberType string
diff --git a/lookup.go b/lookup.go
index ea96ac6f..2b5af9b7 100644
--- a/lookup.go
+++ b/lookup.go
@@ -333,7 +333,7 @@ func (i *Info) GetField(m *MapParams, field string) (*Param, []string, error) {
 		}
 
 		return p, value, nil
-	} else if m == nil && p.Default != "" {
+	} else if p.Default != "" {
 		// If p.Type is []uint, then we need to convert it to []string
 		if strings.HasPrefix(p.Default, "[") {
 			// Remove [] from type
diff --git a/struct.go b/struct.go
index 99d28cef..b203959d 100644
--- a/struct.go
+++ b/struct.go
@@ -39,9 +39,9 @@ func r(f *Faker, t reflect.Type, v reflect.Value, tag string, size int) error {
 
 		switch t.Name() {
 		case "RawMessage":
-			return rJsonRawMessage(f, t, v, tag, size)
+			return rJsonRawMessage(f, v)
 		case "Number":
-			return rJsonNumber(f, t, v, tag, size)
+			return rJsonNumber(f, v, tag)
 		default:
 			return errors.New("unknown encoding/json type: " + t.Name())
 		}
@@ -72,7 +72,7 @@ func r(f *Faker, t reflect.Type, v reflect.Value, tag string, size int) error {
 	return nil
 }
 
-func rCustom(f *Faker, t reflect.Type, v reflect.Value, tag string) error {
+func rCustom(f *Faker, v reflect.Value, tag string) error {
 	// If tag is empty return error
 	if tag == "" {
 		return errors.New("tag is empty")
@@ -126,7 +126,7 @@ func rCustom(f *Faker, t reflect.Type, v reflect.Value, tag string) error {
 func rStruct(f *Faker, t reflect.Type, v reflect.Value, tag string) error {
 	// Check if tag exists, if so run custom function
 	if t.Name() != "" && tag != "" {
-		return rCustom(f, t, v, tag)
+		return rCustom(f, v, tag)
 	}
 
 	// Check if struct is fakeable
@@ -252,7 +252,7 @@ func rSlice(f *Faker, t reflect.Type, v reflect.Value, tag string, size int) err
 	// Check if tag exists, if so run custom function
 	if t.Name() != "" && tag != "" {
 		// Check to see if custom function works if not continue to normal loop of values
-		err := rCustom(f, t, v, tag)
+		err := rCustom(f, v, tag)
 		if err == nil {
 			return nil
 		}
@@ -308,7 +308,7 @@ func rMap(f *Faker, t reflect.Type, v reflect.Value, tag string, size int) error
 
 	// Check if tag exists, if so run custom function
 	if tag != "" {
-		return rCustom(f, t, v, tag)
+		return rCustom(f, v, tag)
 	} else if size > 0 {
 		// NOOP
 	} else if isFakeable(t) {