diff --git a/placeholder.go b/placeholder.go
index e812c7c..d728609 100644
--- a/placeholder.go
+++ b/placeholder.go
@@ -28,7 +28,7 @@ func ReplacePlaceholder(sql string, format string) string {
 		format = Question
 	}
 
-	if format == Dollar || format == Colon {
+	if format == Dollar || format == Colon || format == AtP {
 		separate := strings.SplitAfter(sql, "?")
 		for i := 0; i < len(separate); i++ {
 			separate[i] = strings.Replace(separate[i], "?", format+strconv.Itoa(i+1), 1)
diff --git a/placeholder_test.go b/placeholder_test.go
index 01075a5..0cebb4a 100644
--- a/placeholder_test.go
+++ b/placeholder_test.go
@@ -30,7 +30,7 @@ func TestReplacePlaceholder(t *testing.T) {
 	t.Run("should be able to replace placeholder to @p", func(t *testing.T) {
 		sql := "INSERT INTO table_name (`col1`, `col2`, `col3`) VALUES (?, ?, ?), (?, ?, ?), (?, ?, ?);"
 		result := bob.ReplacePlaceholder(sql, bob.AtP)
-		should := "INSERT INTO table_name (`col1`, `col2`, `col3`) VALUES (@p, @p, @p), (@p, @p, @p), (@p, @p, @p);"
+		should := "INSERT INTO table_name (`col1`, `col2`, `col3`) VALUES (@p1, @p2, @p3), (@p4, @p5, @p6), (@p7, @p8, @p9);"
 
 		if result != should {
 			t.Fatal("result string doesn't match:", result)