diff --git a/sqlx.go b/sqlx.go
index 8259a4feb..95f4669c4 100644
--- a/sqlx.go
+++ b/sqlx.go
@@ -136,6 +136,10 @@ func isUnsafe(i interface{}) bool {
 		return v.unsafe
 	case *Tx:
 		return v.unsafe
+	case Conn:
+		return v.unsafe
+	case *Conn:
+		return v.unsafe
 	case sql.Rows, *sql.Rows:
 		return false
 	default:
@@ -153,6 +157,10 @@ func mapperFor(i interface{}) *reflectx.Mapper {
 		return i.Mapper
 	case *Tx:
 		return i.Mapper
+	case Conn:
+		return i.Mapper
+	case *Conn:
+		return i.Mapper
 	default:
 		return mapper()
 	}