diff --git a/expression/expression.go b/expression/expression.go
index d9971018f7ea7..981eea995f1d8 100644
--- a/expression/expression.go
+++ b/expression/expression.go
@@ -34,7 +34,6 @@ import (
 	"github.com/pingcap/tidb/types"
 	"github.com/pingcap/tidb/types/json"
 	"github.com/pingcap/tidb/util/chunk"
-	"github.com/pingcap/tidb/util/collate"
 	"github.com/pingcap/tidb/util/logutil"
 	"github.com/pingcap/tipb/go-tipb"
 	"go.uber.org/zap"
@@ -1059,7 +1058,7 @@ func canScalarFuncPushDown(scalarFunc *ScalarFunction, pc PbConverter, storeType
 }
 
 func canExprPushDown(expr Expression, pc PbConverter, storeType kv.StoreType) bool {
-	if storeType == kv.TiFlash && (expr.GetType().Tp == mysql.TypeDuration || collate.NewCollationEnabled()) {
+	if storeType == kv.TiFlash && expr.GetType().Tp == mysql.TypeDuration {
 		return false
 	}
 	switch x := expr.(type) {