diff --git a/callbacks/update.go b/callbacks/update.go
index db5b52fb..5cf3fdcf 100644
--- a/callbacks/update.go
+++ b/callbacks/update.go
@@ -3,6 +3,7 @@ package callbacks
 import (
 	"reflect"
 	"sort"
+	"unsafe"
 
 	"gorm.io/gorm"
 	"gorm.io/gorm/clause"
@@ -163,10 +164,46 @@ func ConvertToAssignments(stmt *gorm.Statement) (set clause.Set) {
 		}
 	}
 
-	switch value := updatingValue.Interface().(type) {
-	case map[string]interface{}:
-		set = make([]clause.Assignment, 0, len(value))
+	switch updatingValue.Kind() {
+	case reflect.Struct:
+		set = make([]clause.Assignment, 0, len(stmt.Schema.FieldsByDBName))
+		for _, dbName := range stmt.Schema.DBNames {
+			field := stmt.Schema.LookUpField(dbName)
+			if !field.PrimaryKey || (!updatingValue.CanAddr() || stmt.Dest != stmt.Model) {
+				if v, ok := selectColumns[field.DBName]; (ok && v) || (!ok && (!restricted || (!stmt.SkipHooks && field.AutoUpdateTime > 0))) {
+					value, isZero := field.ValueOf(updatingValue)
+					if !stmt.SkipHooks && field.AutoUpdateTime > 0 {
+						if field.AutoUpdateTime == schema.UnixNanosecond {
+							value = stmt.DB.NowFunc().UnixNano()
+						} else if field.AutoUpdateTime == schema.UnixMillisecond {
+							value = stmt.DB.NowFunc().UnixNano() / 1e6
+						} else if field.GORMDataType == schema.Time {
+							value = stmt.DB.NowFunc()
+						} else {
+							value = stmt.DB.NowFunc().Unix()
+						}
+						isZero = false
+					}
 
+					if ok || !isZero {
+						set = append(set, clause.Assignment{Column: clause.Column{Name: field.DBName}, Value: value})
+						assignValue(field, value)
+					}
+				}
+			} else {
+				if value, isZero := field.ValueOf(updatingValue); !isZero {
+					stmt.AddClause(clause.Where{Exprs: []clause.Expression{clause.Eq{Column: field.DBName, Value: value}}})
+				}
+			}
+		}
+	case reflect.Map:
+		value, ok := convertMap(updatingValue)
+		if !ok {
+			stmt.AddError(gorm.ErrInvalidData)
+			return
+		}
+
+		set = make([]clause.Assignment, 0, len(value))
 		keys := make([]string, 0, len(value))
 		for k := range value {
 			keys = append(keys, k)
@@ -220,42 +257,20 @@ func ConvertToAssignments(stmt *gorm.Statement) (set clause.Set) {
 			}
 		}
 	default:
-		switch updatingValue.Kind() {
-		case reflect.Struct:
-			set = make([]clause.Assignment, 0, len(stmt.Schema.FieldsByDBName))
-			for _, dbName := range stmt.Schema.DBNames {
-				field := stmt.Schema.LookUpField(dbName)
-				if !field.PrimaryKey || (!updatingValue.CanAddr() || stmt.Dest != stmt.Model) {
-					if v, ok := selectColumns[field.DBName]; (ok && v) || (!ok && (!restricted || (!stmt.SkipHooks && field.AutoUpdateTime > 0))) {
-						value, isZero := field.ValueOf(updatingValue)
-						if !stmt.SkipHooks && field.AutoUpdateTime > 0 {
-							if field.AutoUpdateTime == schema.UnixNanosecond {
-								value = stmt.DB.NowFunc().UnixNano()
-							} else if field.AutoUpdateTime == schema.UnixMillisecond {
-								value = stmt.DB.NowFunc().UnixNano() / 1e6
-							} else if field.GORMDataType == schema.Time {
-								value = stmt.DB.NowFunc()
-							} else {
-								value = stmt.DB.NowFunc().Unix()
-							}
-							isZero = false
-						}
-
-						if ok || !isZero {
-							set = append(set, clause.Assignment{Column: clause.Column{Name: field.DBName}, Value: value})
-							assignValue(field, value)
-						}
-					}
-				} else {
-					if value, isZero := field.ValueOf(updatingValue); !isZero {
-						stmt.AddClause(clause.Where{Exprs: []clause.Expression{clause.Eq{Column: field.DBName, Value: value}}})
-					}
-				}
-			}
-		default:
-			stmt.AddError(gorm.ErrInvalidData)
-		}
+		stmt.AddError(gorm.ErrInvalidData)
 	}
-
 	return
 }
+
+func convertMap(src reflect.Value) (map[string]interface{}, bool) {
+	mt := reflect.TypeOf(map[string]interface{}{})
+	if !src.Type().AssignableTo(mt) {
+		return nil, false
+	}
+
+	srcData := src.Interface()
+	// get interface pointer and convert to map
+	v := (unsafe.Pointer)(unsafe.Pointer(uintptr(unsafe.Pointer(&srcData)) + unsafe.Sizeof(int(0))))
+	dst := (*map[string]interface{})(v)
+	return *dst, true
+}