diff --git a/shared/src/main/scala-2.13+/scala/xml/ScalaVersionSpecific.scala b/shared/src/main/scala-2.13+/scala/xml/ScalaVersionSpecific.scala
index bd2eb820d..4258c100f 100644
--- a/shared/src/main/scala-2.13+/scala/xml/ScalaVersionSpecific.scala
+++ b/shared/src/main/scala-2.13+/scala/xml/ScalaVersionSpecific.scala
@@ -1,7 +1,7 @@
 package scala.xml
 
 import scala.collection.immutable.StrictOptimizedSeqOps
-import scala.collection.{SeqOps, IterableOnce, immutable, mutable}
+import scala.collection.{View, SeqOps, IterableOnce, immutable, mutable}
 import scala.collection.BuildFrom
 import scala.collection.mutable.Builder
 
@@ -20,6 +20,21 @@ private[xml] trait ScalaVersionSpecificNodeSeq
   override def fromSpecific(coll: IterableOnce[Node]): NodeSeq = (NodeSeq.newBuilder ++= coll).result()
   override def newSpecificBuilder: mutable.Builder[Node, NodeSeq] = NodeSeq.newBuilder
   override def empty: NodeSeq = NodeSeq.Empty
+  def concat(suffix: IterableOnce[Node]): NodeSeq =
+    fromSpecific(iterator ++ suffix.iterator)
+  @inline final def ++ (suffix: Seq[Node]): NodeSeq = concat(suffix)
+  def appended(base: Node): NodeSeq =
+    fromSpecific(new View.Appended(this, base))
+  def appendedAll(suffix: IterableOnce[Node]): NodeSeq =
+    concat(suffix)
+  def prepended(base: Node): NodeSeq =
+    fromSpecific(new View.Prepended(base, this))
+  def prependedAll(prefix: IterableOnce[Node]): NodeSeq =
+    fromSpecific(prefix.iterator ++ iterator)
+  def map(f: Node => Node): NodeSeq =
+    fromSpecific(new View.Map(this, f))
+  def flatMap(f: Node => IterableOnce[Node]): NodeSeq =
+    fromSpecific(new View.FlatMap(this, f))
 }
 
 private[xml] trait ScalaVersionSpecificNodeBuffer { self: NodeBuffer =>
diff --git a/shared/src/test/scala/scala/xml/NodeSeqTest.scala b/shared/src/test/scala/scala/xml/NodeSeqTest.scala
new file mode 100644
index 000000000..08b7c0d79
--- /dev/null
+++ b/shared/src/test/scala/scala/xml/NodeSeqTest.scala
@@ -0,0 +1,23 @@
+package scala.xml
+
+import scala.xml.NodeSeq.seqToNodeSeq
+
+import org.junit.Test
+import org.junit.Assert.assertEquals
+import org.junit.Assert.fail
+
+class NodeSeqTest {
+
+  @Test
+  def testAppend: Unit = { // Bug #392.
+    val a: NodeSeq = <a>Hello</a>
+    val b = <b>Hi</b>
+    a ++ <b>Hi</b> match {
+      case res: NodeSeq => assertEquals(2, res.size)
+      case res: Seq[Node] => fail("Should be NodeSeq") // Unreachable code?
+    }
+    val res: NodeSeq = a ++ b
+    val exp = NodeSeq.fromSeq(Seq(<a>Hello</a>, <b>Hi</b>))
+    assertEquals(exp, res)
+  }
+}