diff --git a/plugins/Camtool.java b/plugins/Camtool.java
index 6c5bd9d..04cf583 100644
--- a/plugins/Camtool.java
+++ b/plugins/Camtool.java
@@ -38,8 +38,8 @@ public class Camtool extends ArraySource {
         this.latch = latch;
         dataPrefix = prefix + (latch ? "latch": "pipeline") + ".";
         
-        channelRun = new ChannelInteger(name + " run", prefix + "camera.run");
-        channelLatch = new ChannelInteger(name + " latch", prefix + "latch.capture");
+        channelRun = new ChannelInteger(name + " run", this.prefix + "camera.run");
+        channelLatch = new ChannelInteger(name + " latch", this.prefix + "latch.capture");
         channelTimestamp = new ChannelDouble(name + " timestamp", dataPrefix + "timestamp");
         channelTimestamp.setMonitored(true);
         //posX = new ChannelDouble(name + " com x", dataPrefix + "x_stats.com");
@@ -49,9 +49,9 @@ public class Camtool extends ArraySource {
         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");
-        bgEnable = new ChannelInteger(name + " bg enable", prefix + "pipeline.bg.enabled");
-        bgCapture = new ChannelInteger(name + " bg capture", prefix + "pipeline.bg.capture");
-        bgCaptureRemain = new ChannelInteger(name + " bg capture remain", prefix + "pipeline.bg.capture_remain");               
+        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");               
         
         posMeanX = new CamToolPosX();
         posMeanY = new CamToolPosY();