Index: src/main/java/org/apache/jackrabbit/oak/jcr/query/PrefetchIterator.java
===================================================================
--- src/main/java/org/apache/jackrabbit/oak/jcr/query/PrefetchIterator.java	(Revision 1886857)
+++ src/main/java/org/apache/jackrabbit/oak/jcr/query/PrefetchIterator.java	(Arbeitskopie)
@@ -70,7 +70,7 @@
             prefetchIterator = null;
         }
         boolean result = it.hasNext();
-        if (!result) {
+        if (!result && size == -1) {
             size = position;
         }
         return result;