diff --git a/devices/collimatorX.properties b/devices/collimatorX.properties
index 61ad5fe..753ec94 100644
--- a/devices/collimatorX.properties
+++ b/devices/collimatorX.properties
@@ -1,4 +1,4 @@
-#Tue May 19 16:07:56 CEST 2015
+#Tue May 19 16:10:51 CEST 2015
 accessType=ReadWrite
 defaultSpeed=1.0
 maxSpeed=1.0
@@ -9,4 +9,4 @@ offset=0.0
 precision=4
 resolution=0.001
 scale=1.0
-unit=null
+unit=mm