diff --git a/scope.go b/scope.go
index a8ea3459..b0f0a90a 100644
--- a/scope.go
+++ b/scope.go
@@ -256,11 +256,7 @@ func (scope *Scope) AddToVars(value interface{}) string {
 	if expr, ok := value.(*expr); ok {
 		exp := expr.expr
 		for _, arg := range expr.args {
-			if pgParameterRegexp.MatchString(exp) {
-				exp = pgParameterRegexp.ReplaceAllLiteralString(exp, scope.AddToVars(arg))
-			} else {
-				exp = strings.Replace(exp, "?", scope.AddToVars(arg), 1)
-			}
+			exp = scope.replaceParameterPlaceholder(exp, arg)
 		}
 		return exp
 	}
@@ -466,6 +462,21 @@ func (scope *Scope) quoteIfPossible(str string) string {
 	return str
 }
 
+func (scope *Scope) replaceParameterPlaceholderLiteral(sql string, parameter interface{}, addToVars bool) string {
+	if scope.Dialect().GetName() == "postgres" && pgParameterRegexp.MatchString(sql) {
+		sql = pgParameterRegexp.ReplaceAllLiteralString(sql, "?")
+	}
+	if val, ok := parameter.(string); ok && !addToVars {
+		return strings.Replace(sql, "?", val, 1)
+	}
+
+	return strings.Replace(sql, "?", scope.AddToVars(parameter), 1)
+}
+
+func (scope *Scope) replaceParameterPlaceholder(sql string, parameter interface{}) string {
+	return scope.replaceParameterPlaceholderLiteral(sql, parameter, true)
+}
+
 func (scope *Scope) scan(rows *sql.Rows, columns []string, fields []*Field) {
 	var (
 		ignored            interface{}
@@ -555,22 +566,22 @@ func (scope *Scope) buildWhereCondition(clause map[string]interface{}) (str stri
 		switch reflect.ValueOf(arg).Kind() {
 		case reflect.Slice: // For where("id in (?)", []int64{1,2})
 			if bytes, ok := arg.([]byte); ok {
-				str = strings.Replace(str, "?", scope.AddToVars(bytes), 1)
+				str = scope.replaceParameterPlaceholder(str, bytes)
 			} else if values := reflect.ValueOf(arg); values.Len() > 0 {
 				var tempMarks []string
 				for i := 0; i < values.Len(); i++ {
 					tempMarks = append(tempMarks, scope.AddToVars(values.Index(i).Interface()))
 				}
-				str = strings.Replace(str, "?", strings.Join(tempMarks, ","), 1)
+				str = scope.replaceParameterPlaceholderLiteral(str, strings.Join(tempMarks, ","), false)
 			} else {
-				str = strings.Replace(str, "?", scope.AddToVars(Expr("NULL")), 1)
+				str = scope.replaceParameterPlaceholder(str, Expr("NULL"))
 			}
 		default:
 			if valuer, ok := interface{}(arg).(driver.Valuer); ok {
 				arg, _ = valuer.Value()
 			}
 
-			str = strings.Replace(str, "?", scope.AddToVars(arg), 1)
+			str = scope.replaceParameterPlaceholder(str, arg)
 		}
 	}
 	return
@@ -627,21 +638,21 @@ func (scope *Scope) buildNotCondition(clause map[string]interface{}) (str string
 		switch reflect.ValueOf(arg).Kind() {
 		case reflect.Slice: // For where("id in (?)", []int64{1,2})
 			if bytes, ok := arg.([]byte); ok {
-				str = strings.Replace(str, "?", scope.AddToVars(bytes), 1)
+				str = scope.replaceParameterPlaceholder(str, bytes)
 			} else if values := reflect.ValueOf(arg); values.Len() > 0 {
 				var tempMarks []string
 				for i := 0; i < values.Len(); i++ {
 					tempMarks = append(tempMarks, scope.AddToVars(values.Index(i).Interface()))
 				}
-				str = strings.Replace(str, "?", strings.Join(tempMarks, ","), 1)
+				str = scope.replaceParameterPlaceholder(str, strings.Join(tempMarks, ","))
 			} else {
-				str = strings.Replace(str, "?", scope.AddToVars(Expr("NULL")), 1)
+				str = scope.replaceParameterPlaceholder(str, Expr("NULL"))
 			}
 		default:
 			if scanner, ok := interface{}(arg).(driver.Valuer); ok {
 				arg, _ = scanner.Value()
 			}
-			str = strings.Replace(notEqualSQL, "?", scope.AddToVars(arg), 1)
+			str = scope.replaceParameterPlaceholder(notEqualSQL, arg)
 		}
 	}
 	return
@@ -664,12 +675,12 @@ func (scope *Scope) buildSelectQuery(clause map[string]interface{}) (str string)
 			for i := 0; i < values.Len(); i++ {
 				tempMarks = append(tempMarks, scope.AddToVars(values.Index(i).Interface()))
 			}
-			str = strings.Replace(str, "?", strings.Join(tempMarks, ","), 1)
+			str = scope.replaceParameterPlaceholder(str, strings.Join(tempMarks, ","))
 		default:
 			if valuer, ok := interface{}(arg).(driver.Valuer); ok {
 				arg, _ = valuer.Value()
 			}
-			str = strings.Replace(str, "?", scope.AddToVars(arg), 1)
+			str = scope.replaceParameterPlaceholder(str, arg)
 		}
 	}
 	return
@@ -755,7 +766,7 @@ func (scope *Scope) orderSQL() string {
 		} else if expr, ok := order.(*expr); ok {
 			exp := expr.expr
 			for _, arg := range expr.args {
-				exp = strings.Replace(exp, "?", scope.AddToVars(arg), 1)
+				exp = scope.replaceParameterPlaceholder(exp, arg)
 			}
 			orders = append(orders, exp)
 		}