Adding Javadoc via PSI erros

Hmmm, PSI is throwing up the following:

com.intellij.util.IncorrectOperationException: Incorrect comment "/**

• @sometag FOO

*/
".
at com.intellij.psi.impl.r.createCommentFromText(r.java:35)

I'm using the following code:

String comment = "/**\n * @sometag FOO\n */\n";
PsiComment element = elementFactory.createCommentFromText(comment, null);

Any idea why I'd be getting an Incorrect comment?