diff --git a/cad/housing.scad b/cad/housing.scad
index f0c475a..18b5f94 100644
--- a/cad/housing.scad
+++ b/cad/housing.scad
@@ -2,7 +2,7 @@
 // Housing box for UppSense first tries.
 //
 // Author:              Maximilian Stiefel
-// Last modification:   26.04.3017
+// Last modification:   26.04.2017
 /////////////////////////////////////////////////////////////////////////////////
 
 use <open_box.scad>