diff --git a/screening/source/java/ch/systemsx/cisd/openbis/dss/generic/server/images/ImageChannelsUtils.java b/screening/source/java/ch/systemsx/cisd/openbis/dss/generic/server/images/ImageChannelsUtils.java
index b195bc3e235ecf5dea9224e74b89fb5ac4bb02e8..73d543b765a25f523c3cbec19416dbb6cf69dc8a 100644
--- a/screening/source/java/ch/systemsx/cisd/openbis/dss/generic/server/images/ImageChannelsUtils.java
+++ b/screening/source/java/ch/systemsx/cisd/openbis/dss/generic/server/images/ImageChannelsUtils.java
@@ -196,7 +196,7 @@ public class ImageChannelsUtils
         ImageTransformationParams transformationInfo = new ImageTransformationParams(true, mergeAllChannels,
                 transformationCode, transformationsPerChannel);
         List<AbsoluteImageReference> imageContents =
-                imageLoadingHelper.fetchImageContents(imageChannels, mergeAllChannels, false, transformationInfo);
+                imageLoadingHelper.fetchImageContents(imageChannels, mergeAllChannels, true, transformationInfo);
         return calculateBufferedImage(imageContents, transformationInfo);
     }