Index: lucene/queryparser/src/java/org/apache/lucene/queryparser/flexible/standard/processors/LowercaseExpandedTermsQueryNodeProcessor.java
===================================================================
--- lucene/queryparser/src/java/org/apache/lucene/queryparser/flexible/standard/processors/LowercaseExpandedTermsQueryNodeProcessor.java	(revision 1431692)
+++ lucene/queryparser/src/java/org/apache/lucene/queryparser/flexible/standard/processors/LowercaseExpandedTermsQueryNodeProcessor.java	(working copy)
@@ -71,8 +71,7 @@
 
     if (node instanceof WildcardQueryNode
         || node instanceof FuzzyQueryNode
-        || (node instanceof FieldQueryNode && node.getParent() instanceof RangeQueryNode)
-        || node instanceof RegexpQueryNode) {
+        || (node instanceof FieldQueryNode && node.getParent() instanceof RangeQueryNode)) {
 
       TextableQueryNode txtNode = (TextableQueryNode) node;
       CharSequence text = txtNode.getText();