diff --git a/source/net/yacy/kelondro/index/RowCollection.java b/source/net/yacy/kelondro/index/RowCollection.java
index ceeb4d6c7..b572dcf64 100644
--- a/source/net/yacy/kelondro/index/RowCollection.java
+++ b/source/net/yacy/kelondro/index/RowCollection.java
@@ -208,6 +208,11 @@ public class RowCollection implements Iterable<Row.Entry> {
         return this.rowdef;
     }
     
+    protected final int maxIntFromLong(long val) {
+    	if (val >= Integer.MAX_VALUE) return Integer.MAX_VALUE;
+    	return (int) val;
+    }
+    
     protected final long neededSpaceForEnsuredSize(final int elements, final boolean forcegc) {
         assert elements > 0 : "elements = " + elements;
         final long needed = elements * rowdef.objectsize;
@@ -224,12 +229,12 @@ public class RowCollection implements Iterable<Row.Entry> {
     
     protected final void ensureSize(final int elements) throws RowSpaceExceededException {
         if (elements == 0) return;
-        final long allocram = neededSpaceForEnsuredSize(elements, true);
+        final int allocram = maxIntFromLong(neededSpaceForEnsuredSize(elements, true));
         if (allocram == 0) return;
         assert allocram > chunkcache.length : "wrong alloc computation: allocram = " + allocram + ", chunkcache.length = " + chunkcache.length;
         if (!MemoryControl.request(allocram, true)) throw new RowSpaceExceededException(allocram, "RowCollection grow");
         try {
-            final byte[] newChunkcache = new byte[(int) allocram]; // increase space
+            final byte[] newChunkcache = new byte[allocram]; // increase space
             System.arraycopy(chunkcache, 0, newChunkcache, 0, chunkcache.length);
             chunkcache = newChunkcache;
         } catch (OutOfMemoryError e) {