diff --git a/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/client/application/detailviewers/WellContentDialog.java b/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/client/application/detailviewers/WellContentDialog.java
index 6db431533e23cf0997f552fd104fd0bd0388c621..0c942f7b807fea9061c285217c5ce06e6f32cb83 100644
--- a/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/client/application/detailviewers/WellContentDialog.java
+++ b/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/client/application/detailviewers/WellContentDialog.java
@@ -273,7 +273,8 @@ public class WellContentDialog extends Dialog
         {
             return new Text("Incorrect well code.");
         }
-        if (images.getImageParameters().getChannelsNames().contains(channel) == false)
+        if (images.getImageParameters().getChannelsNames().contains(channel) == false
+                && channel.equals(ScreeningConstants.MERGED_CHANNELS) == false)
         {
             return new Text("No images available for this channel.");
         }