diff --git a/plugins/Camtool.java b/plugins/Camtool.java
index 04cf583..80b8514 100644
--- a/plugins/Camtool.java
+++ b/plugins/Camtool.java
@@ -36,7 +36,7 @@ public class Camtool extends ArraySource {
         super(name, prefix + (latch ? ":latch": ":pipeline") + ".image");
         this.prefix = prefix+":";
         this.latch = latch;
-        dataPrefix = prefix + (latch ? "latch": "pipeline") + ".";
+        dataPrefix = this.prefix + (latch ? "latch": "pipeline") + ".";
         
         channelRun = new ChannelInteger(name + " run", this.prefix + "camera.run");
         channelLatch = new ChannelInteger(name + " latch", this.prefix + "latch.capture");