diff --git a/pgtype/hstore.go b/pgtype/hstore.go
index ca0c3f6f7..e4695819a 100644
--- a/pgtype/hstore.go
+++ b/pgtype/hstore.go
@@ -42,7 +42,7 @@ func (h *Hstore) Scan(src any) error {
 
 	switch src := src.(type) {
 	case string:
-		return scanPlanTextAnyToHstoreScanner{}.Scan([]byte(src), h)
+		return scanPlanTextAnyToHstoreScanner{}.scanString(src, h)
 	}
 
 	return fmt.Errorf("cannot scan %T", src)
@@ -236,14 +236,18 @@ func (scanPlanBinaryHstoreToHstoreScanner) Scan(src []byte, dst any) error {
 
 type scanPlanTextAnyToHstoreScanner struct{}
 
-func (scanPlanTextAnyToHstoreScanner) Scan(src []byte, dst any) error {
+func (s scanPlanTextAnyToHstoreScanner) Scan(src []byte, dst any) error {
 	scanner := (dst).(HstoreScanner)
 
 	if src == nil {
 		return scanner.ScanHstore(Hstore(nil))
 	}
+	return s.scanString(string(src), scanner)
+}
 
-	keys, values, err := parseHstore(string(src))
+// scanString does not return nil hstore values because string cannot be nil.
+func (scanPlanTextAnyToHstoreScanner) scanString(src string, scanner HstoreScanner) error {
+	keys, values, err := parseHstore(src)
 	if err != nil {
 		return err
 	}
diff --git a/pgtype/hstore_test.go b/pgtype/hstore_test.go
index e2b6bb4ef..4f93a94d9 100644
--- a/pgtype/hstore_test.go
+++ b/pgtype/hstore_test.go
@@ -288,3 +288,22 @@ func BenchmarkHstoreEncode(b *testing.B) {
 		})
 	}
 }
+
+func BenchmarkHstoreScan(b *testing.B) {
+	strs := []string{
+		"",
+		`"a"=>"b"`,
+		`"a"=>"100", "b"=>"200", "c"=>"300", "d"=>"400", "e"=>"500"`,
+	}
+
+	var h pgtype.Hstore
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		for _, str := range strs {
+			err := h.Scan(str)
+			if err != nil {
+				b.Fatal(err)
+			}
+		}
+	}
+}