diff --git a/callback_update.go b/callback_update.go
index 192d8a9e..aa27b5fb 100644
--- a/callback_update.go
+++ b/callback_update.go
@@ -21,12 +21,10 @@ func init() {
 // assignUpdatingAttributesCallback assign updating attributes to model
 func assignUpdatingAttributesCallback(scope *Scope) {
 	if attrs, ok := scope.InstanceGet("gorm:update_interface"); ok {
-		if maps := convertInterfaceToMap(attrs); len(maps) > 0 {
-			if updateMaps, hasUpdate := scope.updatedAttrsWithValues(maps); hasUpdate {
-				scope.InstanceSet("gorm:update_attrs", updateMaps)
-			} else {
-				scope.SkipLeft()
-			}
+		if updateMaps, hasUpdate := scope.updatedAttrsWithValues(attrs); hasUpdate {
+			scope.InstanceSet("gorm:update_attrs", updateMaps)
+		} else {
+			scope.SkipLeft()
 		}
 	}
 }
diff --git a/main.go b/main.go
index a5201d48..d09cf416 100644
--- a/main.go
+++ b/main.go
@@ -310,7 +310,7 @@ func (s *DB) FirstOrInit(out interface{}, where ...interface{}) *DB {
 		}
 		c.NewScope(out).inlineCondition(where...).initialize()
 	} else {
-		c.NewScope(out).updatedAttrsWithValues(convertInterfaceToMap(c.search.assignAttrs))
+		c.NewScope(out).updatedAttrsWithValues(c.search.assignAttrs)
 	}
 	return c
 }
diff --git a/scope.go b/scope.go
index a5eedbac..da5f7ff3 100644
--- a/scope.go
+++ b/scope.go
@@ -793,27 +793,55 @@ func (scope *Scope) callCallbacks(funcs []*func(s *Scope)) *Scope {
 	return scope
 }
 
-func (scope *Scope) updatedAttrsWithValues(values map[string]interface{}) (results map[string]interface{}, hasUpdate bool) {
+func convertInterfaceToMap(values interface{}) map[string]interface{} {
+	var attrs = map[string]interface{}{}
+
+	switch value := values.(type) {
+	case map[string]interface{}:
+		return value
+	case []interface{}:
+		for _, v := range value {
+			for key, value := range convertInterfaceToMap(v) {
+				attrs[key] = value
+			}
+		}
+	case interface{}:
+		reflectValue := reflect.ValueOf(values)
+
+		switch reflectValue.Kind() {
+		case reflect.Map:
+			for _, key := range reflectValue.MapKeys() {
+				attrs[ToDBName(key.Interface().(string))] = reflectValue.MapIndex(key).Interface()
+			}
+		default:
+			for _, field := range (&Scope{Value: values}).Fields() {
+				if !field.IsBlank {
+					attrs[field.DBName] = field.Field.Interface()
+				}
+			}
+		}
+	}
+	return attrs
+}
+
+func (scope *Scope) updatedAttrsWithValues(value interface{}) (results map[string]interface{}, hasUpdate bool) {
 	if scope.IndirectValue().Kind() != reflect.Struct {
-		return values, true
+		return convertInterfaceToMap(value), true
 	}
 
 	results = map[string]interface{}{}
-	for key, value := range values {
+
+	for key, value := range convertInterfaceToMap(value) {
 		if field, ok := scope.FieldByName(key); ok && scope.changeableField(field) {
-			if !reflect.DeepEqual(field.Field, reflect.ValueOf(value)) {
-				if _, ok := value.(*expr); ok {
-					hasUpdate = true
-					results[field.DBName] = value
-				} else if !equalAsString(field.Field.Interface(), value) {
-					field.Set(value)
-					if field.IsNormal {
-						hasUpdate = true
-						results[field.DBName] = field.Field.Interface()
-					}
-				}
+			if _, ok := value.(*expr); ok {
+				hasUpdate = true
+				results[field.DBName] = value
 			} else {
 				field.Set(value)
+				if field.IsNormal {
+					hasUpdate = true
+					results[field.DBName] = field.Field.Interface()
+				}
 			}
 		}
 	}
@@ -836,10 +864,10 @@ func (scope *Scope) rows() (*sql.Rows, error) {
 
 func (scope *Scope) initialize() *Scope {
 	for _, clause := range scope.Search.whereConditions {
-		scope.updatedAttrsWithValues(convertInterfaceToMap(clause["query"]))
+		scope.updatedAttrsWithValues(clause["query"])
 	}
-	scope.updatedAttrsWithValues(convertInterfaceToMap(scope.Search.initAttrs))
-	scope.updatedAttrsWithValues(convertInterfaceToMap(scope.Search.assignAttrs))
+	scope.updatedAttrsWithValues(scope.Search.initAttrs)
+	scope.updatedAttrsWithValues(scope.Search.assignAttrs)
 	return scope
 }
 
diff --git a/update_test.go b/update_test.go
index 218c5834..bdf01091 100644
--- a/update_test.go
+++ b/update_test.go
@@ -20,13 +20,6 @@ func TestUpdate(t *testing.T) {
 	DB.First(&product1, product1.Id)
 	DB.First(&product2, product2.Id)
 	updatedAt1 := product1.UpdatedAt
-	updatedAt2 := product2.UpdatedAt
-
-	var product3 Product
-	DB.First(&product3, product2.Id).Update("code", "product2newcode")
-	if updatedAt2.Format(time.RFC3339Nano) != product3.UpdatedAt.Format(time.RFC3339Nano) {
-		t.Errorf("updatedAt should not be updated if nothing changed")
-	}
 
 	if DB.First(&Product{}, "code = ?", product1.Code).RecordNotFound() {
 		t.Errorf("Product1 should not be updated")
@@ -135,19 +128,8 @@ func TestUpdates(t *testing.T) {
 
 	DB.First(&product1, product1.Id)
 	DB.First(&product2, product2.Id)
-	updatedAt1 := product1.UpdatedAt
 	updatedAt2 := product2.UpdatedAt
 
-	var product3 Product
-	DB.First(&product3, product1.Id).Updates(Product{Code: "product1newcode", Price: 100})
-	if product3.Code != "product1newcode" || product3.Price != 100 {
-		t.Errorf("Record should be updated with struct")
-	}
-
-	if updatedAt1.Format(time.RFC3339Nano) != product3.UpdatedAt.Format(time.RFC3339Nano) {
-		t.Errorf("updatedAt should not be updated if nothing changed")
-	}
-
 	if DB.First(&Product{}, "code = ? and price = ?", product2.Code, product2.Price).RecordNotFound() {
 		t.Errorf("Product2 should not be updated")
 	}
diff --git a/utils.go b/utils.go
index c525631c..8ac4fa7d 100644
--- a/utils.go
+++ b/utils.go
@@ -199,37 +199,6 @@ func toSearchableMap(attrs ...interface{}) (result interface{}) {
 	return
 }
 
-func convertInterfaceToMap(values interface{}) map[string]interface{} {
-	attrs := map[string]interface{}{}
-
-	switch value := values.(type) {
-	case map[string]interface{}:
-		return value
-	case []interface{}:
-		for _, v := range value {
-			for key, value := range convertInterfaceToMap(v) {
-				attrs[key] = value
-			}
-		}
-	case interface{}:
-		reflectValue := reflect.ValueOf(values)
-
-		switch reflectValue.Kind() {
-		case reflect.Map:
-			for _, key := range reflectValue.MapKeys() {
-				attrs[ToDBName(key.Interface().(string))] = reflectValue.MapIndex(key).Interface()
-			}
-		default:
-			for _, field := range (&Scope{Value: values}).Fields() {
-				if !field.IsBlank {
-					attrs[field.DBName] = field.Field.Interface()
-				}
-			}
-		}
-	}
-	return attrs
-}
-
 func equalAsString(a interface{}, b interface{}) bool {
 	return toString(a) == toString(b)
 }