diff --git a/internal_test.go b/internal_test.go
index 38dec01..2e42335 100644
--- a/internal_test.go
+++ b/internal_test.go
@@ -141,9 +141,10 @@ func TestSchemaTypes(t *testing.T) {
 	var pe map[time.Time]string
 	var pf map[*int]string
 	type PU struct {
-		Unknown interface{}
+		Any interface{}
 	}
 	var pg PU
+	var ph map[string]interface{}
 	tests := []struct {
 		p     interface{}
 		panic bool
@@ -196,8 +197,13 @@ func TestSchemaTypes(t *testing.T) {
 		},
 		{
 			p:     &pg,
-			panic: true,
-			name:  "Struct inner invalid type",
+			panic: false,
+			name:  "Struct interface field type",
+		},
+		{
+			p:     &ph,
+			panic: false,
+			name:  "Map interface value type",
 		},
 	}
 	for _, tt := range tests {
diff --git a/validator.go b/validator.go
index 2689003..883772f 100644
--- a/validator.go
+++ b/validator.go
@@ -78,7 +78,7 @@ func isValidSchema(t reflect.Type, inner bool, pres ...reflect.Type) bool {
 	switch t.Kind() {
 	case reflect.Bool, reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
 		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr,
-		reflect.Float32, reflect.Float64, reflect.String:
+		reflect.Float32, reflect.Float64, reflect.String, reflect.Interface:
 		return true
 	case reflect.Array, reflect.Slice:
 		return isValidSchema(t.Elem(), inner, pres...)