diff --git a/dspace-oai/src/main/java/org/dspace/app/oai/RDFCrosswalk.java b/dspace-oai/src/main/java/org/dspace/app/oai/RDFCrosswalk.java
index d07016e236..b6835c3c3b 100644
--- a/dspace-oai/src/main/java/org/dspace/app/oai/RDFCrosswalk.java
+++ b/dspace-oai/src/main/java/org/dspace/app/oai/RDFCrosswalk.java
@@ -207,7 +207,13 @@ public class RDFCrosswalk extends Crosswalk
         	for (int j = 0; j < bitstreams.length; j++)
         	{
         		String tName = bitstreams[j].getName() + ".jpg";
-				Bitstream tb = thumbBundles[0].getBitstreamByName(tName);
+				Bitstream tb = null;
+
+                if (thumbBundles.length > 0)
+                {
+                    tb = thumbBundles[0].getBitstreamByName(tName);
+                }
+
 				if (tb != null)
 				{
 					String thumbUrl = null;