Index: oak-core/src/main/java/org/apache/jackrabbit/oak/query/ast/NotImpl.java
===================================================================
--- oak-core/src/main/java/org/apache/jackrabbit/oak/query/ast/NotImpl.java	(revision 1785789)
+++ oak-core/src/main/java/org/apache/jackrabbit/oak/query/ast/NotImpl.java	(working copy)
@@ -129,7 +129,7 @@
         // Also, if the constraint _contains_ a unfiltered fulltext condition, as in
         // "not (x=1 or contains(., 'x')".
         return constraint.requiresFullTextIndex() || 
-                constraint.requiresFullTextIndex();
+                constraint.containsUnfilteredFullTextCondition();
     }
 
 }