diff --git a/plugins/Camtool.java b/plugins/Camtool.java
index b21a4f9..a078a59 100644
--- a/plugins/Camtool.java
+++ b/plugins/Camtool.java
@@ -48,7 +48,7 @@ public class Camtool extends ArraySource {
         posY = new ChannelDouble(name + " com y", dataPrefix + "y_stats.com_egu");
         profileX = new ChannelDoubleArray(name + " profile x", dataPrefix + "profile.x");
         profileY = new ChannelDoubleArray(name + " profile y", dataPrefix + "profile.y");
-        shape = new ChannelIntegerArray(name + " shape", dataPrefix + "image.shape");
+        shape = new ChannelIntegerArray(name + " shape", dataPrefix + (roi ? "roi.output.shape": "image.shape"));
         bgEnable = new ChannelInteger(name + " bg enable", this.prefix + "pipeline.bg.enabled");
         bgCapture = new ChannelInteger(name + " bg capture", this.prefix + "pipeline.bg.capture");
         bgCaptureRemain = new ChannelInteger(name + " bg capture remain", this.prefix + "pipeline.bg.capture_remain");