compile error with SOLR 69 MoreLikeThis patch

[Andrew Nagy]

I downloaded and patched my solr source with the latest solr69 patch and 
whenever I run ant I get an error:

[javac] 
/office/src/apache-solr-nightly/src/java/org/apache/solr/handler/MoreLikeThisHandler.java:145: 
cannot find symbol
[javac] symbol  : variable DEFAULT_MIN_DOC_FREQ
[javac] location: class org.apache.lucene.search.similar.MoreLikeThis
[javac]       mlt.setMinDocFreq(        
params.getInt(MoreLikeThisParams.MIN_DOC_FREQ,          
MoreLikeThis.DEFAULT_MIN_DOC_FREQ));
[javac]                                                                                                     
^


Did I miss something, or maybe I have a non-compatible version of SOLR?

Thanks
Andrew