Index: src/commandline/org/tigris/subversion/svnclientadapter/commandline/CmdLineClientAdapter.java
===================================================================
--- src/commandline/org/tigris/subversion/svnclientadapter/commandline/CmdLineClientAdapter.java	(revision 3719)
+++ src/commandline/org/tigris/subversion/svnclientadapter/commandline/CmdLineClientAdapter.java	(working copy)
@@ -935,7 +935,7 @@
      */
 	public void doExport(File srcPath, File destPath, boolean force) throws SVNClientException {
 		try {
-			_cmd.export(toString(srcPath), toString(destPath), null, force);
+			_cmd.export(toString(srcPath), toString(destPath), "BASE", force);
 		} catch (CmdLineException e) {
 			throw SVNClientException.wrapException(e);
 		}