diff --git a/core/src/main/java/hudson/FilePath.java b/core/src/main/java/hudson/FilePath.java
index 51bf76f324..1c9fdc2a65 100644
--- a/core/src/main/java/hudson/FilePath.java
+++ b/core/src/main/java/hudson/FilePath.java
@@ -1766,14 +1766,20 @@ public final class FilePath implements Serializable {
         act(new FileCallable<Void>() {
             private static final long serialVersionUID = 1L;
             public Void invoke(File f, VirtualChannel channel) throws IOException {
+                // JENKINS-16846: if f.getName() is the same as one of the files/directories in f,
+                // then the rename op will fail
+                File tmp = new File(f.getAbsolutePath()+".__rename");
+                if (!f.renameTo(tmp))
+                    throw new IOException("Failed to rename "+f+" to "+tmp);
+
                 File t = new File(target.getRemote());
                 
-                for(File child : f.listFiles()) {
+                for(File child : tmp.listFiles()) {
                     File target = new File(t, child.getName());
                     if(!child.renameTo(target))
                         throw new IOException("Failed to rename "+child+" to "+target);
                 }
-                f.delete();
+                tmp.delete();
                 return null;
             }
         });
diff --git a/core/src/test/java/hudson/FilePathTest.java b/core/src/test/java/hudson/FilePathTest.java
index 5e32218296..529fcd937e 100644
--- a/core/src/test/java/hudson/FilePathTest.java
+++ b/core/src/test/java/hudson/FilePathTest.java
@@ -618,4 +618,33 @@ public class FilePathTest extends ChannelTestCase {
 
         return new ByteArrayInputStream(buf.toByteArray());
     }
+
+    @Bug(16846)
+    public void testMoveAllChildrenTo() throws IOException, InterruptedException {
+        final File tmp = Util.createTempDir();
+        try
+        {
+            final String dirname = "sub";
+            final File top = new File(tmp, "test");
+            final File sub = new File(top, dirname);
+            final File subsub = new File(sub, dirname);
+
+            subsub.mkdirs();
+
+            final File subFile1 = new File( sub.getAbsolutePath() + "/file1.txt" );
+            subFile1.createNewFile();
+            final File subFile2 = new File( subsub.getAbsolutePath() + "/file2.txt" );
+            subFile2.createNewFile();
+
+            final FilePath src = new FilePath(sub);
+            final FilePath dst = new FilePath(top);
+            
+            // test conflict subdir
+            src.moveAllChildrenTo(dst);
+        }
+        finally
+        {
+          Util.deleteRecursive(tmp);
+        }
+    }
 }